125829726920 has 32 divisors (see below), whose sum is σ = 285183444600. Its totient is φ = 49964502528.

The previous prime is 125829726899. The next prime is 125829726937. The reversal of 125829726920 is 29627928521.

It can be written as a sum of positive squares in 4 ways, for example, as 63656299204 + 62173427716 = 252302^2 + 249346^2 .

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, 11475335 + ... + 11486294.

Almost surely, 2^125829726920 is an apocalyptic number.

125829726920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125829726920 is an abundant number, since it is smaller than the sum of its proper divisors (159353717680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125829726920 is a wasteful number, since it uses less digits than its factorization.

125829726920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22961777 (or 22961773 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 125829726920 in words is "one hundred twenty-five billion, eight hundred twenty-nine million, seven hundred twenty-six thousand, nine hundred twenty".