125777837638 has 8 divisors (see below), whose sum is σ = 189076013280. Its totient is φ = 62752499880.

The previous prime is 125777837611. The next prime is 125777837671. The reversal of 125777837638 is 836738777521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 125777837638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68208318 + ... + 68210161.

It is an arithmetic number, because the mean of its divisors is an integer number (23634501660).

Almost surely, 2^125777837638 is an apocalyptic number.

125777837638 is a deficient number, since it is larger than the sum of its proper divisors (63298175642).

125777837638 is a wasteful number, since it uses less digits than its factorization.

125777837638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136418942.

The product of its digits is 82978560, while the sum is 64.

The spelling of 125777837638 in words is "one hundred twenty-five billion, seven hundred seventy-seven million, eight hundred thirty-seven thousand, six hundred thirty-eight".