125978878879 has 16 divisors (see below), whose sum is σ = 153843624000. Its totient is φ = 100697624064.

The previous prime is 125978878877. The next prime is 125978878889. The reversal of 125978878879 is 978878879521.

It is a cyclic number.

It is not a de Polignac number, because 125978878879 - 2¹ = 125978878877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125978878799 and 125978878808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125978878877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4843204 + ... + 4869145.

It is an arithmetic number, because the mean of its divisors is an integer number (9615226500).

Almost surely, 2^125978878879 is an apocalyptic number.

125978878879 is a deficient number, since it is larger than the sum of its proper divisors (27864745121).

125978878879 is a wasteful number, since it uses less digits than its factorization.

125978878879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712482.

The product of its digits is 1137991680, while the sum is 79.

The spelling of 125978878879 in words is "one hundred twenty-five billion, nine hundred seventy-eight million, eight hundred seventy-eight thousand, eight hundred seventy-nine".