656219225025 has 72 divisors (see below), whose sum is σ = 1446598870080. Its totient is φ = 276910081920.

The previous prime is 656219225023. The next prime is 656219225033. The reversal of 656219225025 is 520522912656.

656219225025 is a `hidden beast` number, since 6 + 56 + 2 + 1 + 92 + 2 + 502 + 5 = 666.

It is not a de Polignac number, because 656219225025 - 2¹ = 656219225023 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (656219225023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16004415 + ... + 16045364.

Almost surely, 2^656219225025 is an apocalyptic number.

656219225025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

656219225025 is an abundant number, since it is smaller than the sum of its proper divisors (790379645055).

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

656219225025 is a wasteful number, since it uses less digits than its factorization.

656219225025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32049815 (or 32049807 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 656219225025 in words is "six hundred fifty-six billion, two hundred nineteen million, two hundred twenty-five thousand, twenty-five".