63985516 has 24 divisors (see below), whose sum is σ = 128369696. Its totient is φ = 27336960.

The previous prime is 63985463. The next prime is 63985541. The reversal of 63985516 is 61558936.

63985516 = T₄₄₀ + T₄₄₁ + ... + T₇₇₆.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6046 + ... + 12826.

Almost surely, 2^63985516 is an apocalyptic number.

It is an amenable number.

63985516 is an abundant number, since it is smaller than the sum of its proper divisors (64384180).

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

63985516 is a wasteful number, since it uses less digits than its factorization.

63985516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129 (or 7127 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 63985516 is about 7999.0946987769. The cubic root of 63985516 is about 399.9698227234.

The spelling of 63985516 in words is "sixty-three million, nine hundred eighty-five thousand, five hundred sixteen".