656461530 has 64 divisors (see below), whose sum is σ = 1763441280. Its totient is φ = 173768832.

The previous prime is 656461529. The next prime is 656461541. The reversal of 656461530 is 35164656.

656461530 is a `hidden beast` number, since 6 + 5 + 6 + 4 + 615 + 30 = 666.

656461530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 28117 + ... + 45863.

It is an arithmetic number, because the mean of its divisors is an integer number (27553770).

Almost surely, 2^656461530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656461530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881720640).

656461530 is an abundant number, since it is smaller than the sum of its proper divisors (1106979750).

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

656461530 is a wasteful number, since it uses less digits than its factorization.

656461530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17900 (or 17894 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 656461530 is about 25621.5052251034. The cubic root of 656461530 is about 869.1000205776.

It can be divided in two parts, 65646 and 1530, that added together give a palindrome (67176).

The spelling of 656461530 in words is "six hundred fifty-six million, four hundred sixty-one thousand, five hundred thirty".