646529896 has 16 divisors (see below), whose sum is σ = 1212597540. Its totient is φ = 323170560.

The previous prime is 646529879. The next prime is 646529927. The reversal of 646529896 is 698925646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 629307396 + 17222500 = 25086^2 + 4150^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23536 + ... + 42976.

Almost surely, 2^646529896 is an apocalyptic number.

It is an amenable number.

646529896 is a deficient number, since it is larger than the sum of its proper divisors (566067644).

646529896 is a wasteful number, since it uses less digits than its factorization.

646529896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604 (or 23600 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The square root of 646529896 is about 25426.9521571108. The cubic root of 646529896 is about 864.6948464189.

The spelling of 646529896 in words is "six hundred forty-six million, five hundred twenty-nine thousand, eight hundred ninety-six".