656919045 has 32 divisors (see below), whose sum is σ = 1169475840. Its totient is φ = 349871040.

The previous prime is 656919023. The next prime is 656919089. The reversal of 656919045 is 540919656.

It is a happy number.

It is not a de Polignac number, because 656919045 - 2⁷ = 656918917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107872 + ... + 113798.

It is an arithmetic number, because the mean of its divisors is an integer number (36546120).

Almost surely, 2^656919045 is an apocalyptic number.

It is an amenable number.

656919045 is a deficient number, since it is larger than the sum of its proper divisors (512556795).

656919045 is a wasteful number, since it uses less digits than its factorization.

656919045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762 (or 6756 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 656919045 is about 25630.4320096248. The cubic root of 656919045 is about 869.3018775230.

The spelling of 656919045 in words is "six hundred fifty-six million, nine hundred nineteen thousand, forty-five".