656148897 has 8 divisors (see below), whose sum is σ = 972072480. Its totient is φ = 437432580.

The previous prime is 656148877. The next prime is 656148923. The reversal of 656148897 is 798841656.

It is a de Polignac number, because none of the positive numbers 2^k-656148897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (656148817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12150879 + ... + 12150932.

It is an arithmetic number, because the mean of its divisors is an integer number (121509060).

Almost surely, 2^656148897 is an apocalyptic number.

It is an amenable number.

656148897 is a deficient number, since it is larger than the sum of its proper divisors (315923583).

656148897 is a wasteful number, since it uses less digits than its factorization.

656148897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24301820 (or 24301814 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 656148897 is about 25615.4035103880. The cubic root of 656148897 is about 868.9620320443.

The spelling of 656148897 in words is "six hundred fifty-six million, one hundred forty-eight thousand, eight hundred ninety-seven".