63681700 has 18 divisors (see below), whose sum is σ = 138189506. Its totient is φ = 25472640.

The previous prime is 63681697. The next prime is 63681721. The reversal of 63681700 is 718636.

63681700 = 1584² + 1585² + ... + 1608².

It can be written as a sum of positive squares in 3 ways, for example, as 574564 + 63107136 = 758^2 + 7944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318309 + ... + 318508.

Almost surely, 2^63681700 is an apocalyptic number.

It is an amenable number.

63681700 is an abundant number, since it is smaller than the sum of its proper divisors (74507806).

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

63681700 is a wasteful number, since it uses less digits than its factorization.

63681700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636831 (or 636824 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 63681700 is about 7980.0814532184. The cubic root of 63681700 is about 399.3357726155.

The spelling of 63681700 in words is "sixty-three million, six hundred eighty-one thousand, seven hundred".