125551420000000 has 288 divisors, whose sum is σ = 318403284885504. Its totient is φ = 49396800000000.

The previous prime is 125551419999917. The next prime is 125551420000009. The reversal of 125551420000000 is 24155521.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 125551420000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125551420000009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1219948545 + ... + 1220051455.

It is an arithmetic number, because the mean of its divisors is an integer number (1105566961408).

Almost surely, 2^{125551420000000} is an apocalyptic number.

125551420000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125551420000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159201642442752).

125551420000000 is an abundant number, since it is smaller than the sum of its proper divisors (192851864885504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125551420000000 is an frugal number, since it uses more digits than its factorization.

125551420000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103023 (or 102979 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 125551420000000 its reverse (24155521), we get a palindrome (125551444155521).

The spelling of 125551420000000 in words is "one hundred twenty-five trillion, five hundred fifty-one billion, four hundred twenty million", and thus it is an aban number.