125531138867432 has 8 divisors (see below), whose sum is σ = 235370885376450. Its totient is φ = 62765569433712.

The previous prime is 125531138867383. The next prime is 125531138867503. The reversal of 125531138867432 is 234768831135521.

It can be written as a sum of positive squares in only one way, i.e., 117077896624516 + 8453242242916 = 10820254^2 + 2907446^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7845696179207 + ... + 7845696179222.

Almost surely, 2^{125531138867432} is an apocalyptic number.

It is an amenable number.

125531138867432 is a deficient number, since it is larger than the sum of its proper divisors (109839746509018).

125531138867432 is a wasteful number, since it uses less digits than its factorization.

125531138867432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15691392358435 (or 15691392358431 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 59.

The spelling of 125531138867432 in words is "one hundred twenty-five trillion, five hundred thirty-one billion, one hundred thirty-eight million, eight hundred sixty-seven thousand, four hundred thirty-two".