656497650 has 48 divisors (see below), whose sum is σ = 1684267200. Its totient is φ = 169028160.

The previous prime is 656497637. The next prime is 656497657. The reversal of 656497650 is 56794656.

It is a self number, because there is not a number n which added to its sum of digits gives 656497650.

It is not an unprimeable number, because it can be changed into a prime (656497657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71110 + ... + 79809.

It is an arithmetic number, because the mean of its divisors is an integer number (35088900).

Almost surely, 2^656497650 is an apocalyptic number.

656497650 is an abundant number, since it is smaller than the sum of its proper divisors (1027769550).

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

656497650 is a wasteful number, since it uses less digits than its factorization.

656497650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150963 (or 150958 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 48.

The square root of 656497650 is about 25622.2100920276. The cubic root of 656497650 is about 869.1159602357.

The spelling of 656497650 in words is "six hundred fifty-six million, four hundred ninety-seven thousand, six hundred fifty".