656045520 has 160 divisors (see below), whose sum is σ = 2249772672. Its totient is φ = 157095936.

The previous prime is 656045443. The next prime is 656045531. The reversal of 656045520 is 25540656.

It is a happy number.

656045520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 112599 + ... + 118281.

Almost surely, 2^656045520 is an apocalyptic number.

656045520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656045520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124886336).

656045520 is an abundant number, since it is smaller than the sum of its proper divisors (1593727152).

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

656045520 is a wasteful number, since it uses less digits than its factorization.

656045520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5749 (or 5743 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 656045520 is about 25613.3855630215. The cubic root of 656045520 is about 868.9163943309.

The spelling of 656045520 in words is "six hundred fifty-six million, forty-five thousand, five hundred twenty".