125402055440 has 80 divisors (see below), whose sum is σ = 304662643200. Its totient is φ = 47912679936.

The previous prime is 125402055329. The next prime is 125402055473. The reversal of 125402055440 is 44550204521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 125402055397 and 125402055406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1275566 + ... + 1370354.

It is an arithmetic number, because the mean of its divisors is an integer number (3808283040).

Almost surely, 2^125402055440 is an apocalyptic number.

125402055440 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 125402055440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152331321600).

125402055440 is an abundant number, since it is smaller than the sum of its proper divisors (179260587760).

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

125402055440 is a wasteful number, since it uses less digits than its factorization.

125402055440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95544 (or 95538 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 125402055440 its reverse (44550204521), we get a palindrome (169952259961).

The spelling of 125402055440 in words is "one hundred twenty-five billion, four hundred two million, fifty-five thousand, four hundred forty".