125831402878 has 16 divisors (see below), whose sum is σ = 191993328000. Its totient is φ = 61834150552.

The previous prime is 125831402869. The next prime is 125831402881. The reversal of 125831402878 is 878204138521.

It is a happy number.

It is a congruent number.

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, 359583 + ... + 617221.

It is an arithmetic number, because the mean of its divisors is an integer number (11999583000).

Almost surely, 2^125831402878 is an apocalyptic number.

125831402878 is a deficient number, since it is larger than the sum of its proper divisors (66161925122).

125831402878 is a wasteful number, since it uses less digits than its factorization.

125831402878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261839.

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 125831402878 in words is "one hundred twenty-five billion, eight hundred thirty-one million, four hundred two thousand, eight hundred seventy-eight".