125838815812 has 24 divisors (see below), whose sum is σ = 227241714560. Its totient is φ = 60928731360.

The previous prime is 125838815783. The next prime is 125838815821. The reversal of 125838815812 is 218518838521.

It is a happy number.

It is a super-2 number, since 2×125838815812² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125838815812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1983612 + ... + 2046067.

Almost surely, 2^125838815812 is an apocalyptic number.

It is an amenable number.

125838815812 is a deficient number, since it is larger than the sum of its proper divisors (101402898748).

125838815812 is a wasteful number, since it uses less digits than its factorization.

125838815812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4029931 (or 4029929 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 52.

The spelling of 125838815812 in words is "one hundred twenty-five billion, eight hundred thirty-eight million, eight hundred fifteen thousand, eight hundred twelve".