656125740 has 36 divisors (see below), whose sum is σ = 1990248624. Its totient is φ = 174966816.

The previous prime is 656125733. The next prime is 656125793. The reversal of 656125740 is 47521656.

It is a happy number.

656125740 is a `hidden beast` number, since 6 + 561 + 2 + 57 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 656125695 and 656125704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1822392 + ... + 1822751.

It is an arithmetic number, because the mean of its divisors is an integer number (55284684).

Almost surely, 2^656125740 is an apocalyptic number.

656125740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656125740 is an abundant number, since it is smaller than the sum of its proper divisors (1334122884).

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

656125740 is a wasteful number, since it uses less digits than its factorization.

656125740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645158 (or 3645153 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 656125740 is about 25614.9514932197. The cubic root of 656125740 is about 868.9518093695.

The spelling of 656125740 in words is "six hundred fifty-six million, one hundred twenty-five thousand, seven hundred forty".