125131434155 has 64 divisors (see below), whose sum is σ = 188695879680. Its totient is φ = 77554215936.

The previous prime is 125131434139. The next prime is 125131434229. The reversal of 125131434155 is 551434131521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125131434155 - 2⁴ = 125131434139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4603334 + ... + 4630436.

It is an arithmetic number, because the mean of its divisors is an integer number (2948373120).

Almost surely, 2^125131434155 is an apocalyptic number.

125131434155 is a deficient number, since it is larger than the sum of its proper divisors (63564445525).

125131434155 is a wasteful number, since it uses less digits than its factorization.

125131434155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27340.

The product of its digits is 36000, while the sum is 35.

Adding to 125131434155 its reverse (551434131521), we get a palindrome (676565565676).

The spelling of 125131434155 in words is "one hundred twenty-five billion, one hundred thirty-one million, four hundred thirty-four thousand, one hundred fifty-five".