63617864 has 8 divisors (see below), whose sum is σ = 119283510. Its totient is φ = 31808928.

The previous prime is 63617843. The next prime is 63617867. The reversal of 63617864 is 46871636.

It can be written as a sum of positive squares in only one way, i.e., 58644964 + 4972900 = 7658^2 + 2230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (63617867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3976109 + ... + 3976124.

Almost surely, 2^63617864 is an apocalyptic number.

It is an amenable number.

63617864 is a deficient number, since it is larger than the sum of its proper divisors (55665646).

63617864 is a wasteful number, since it uses less digits than its factorization.

63617864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7952239 (or 7952235 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 63617864 is about 7976.0807418180. The cubic root of 63617864 is about 399.2022935519.

The spelling of 63617864 in words is "sixty-three million, six hundred seventeen thousand, eight hundred sixty-four".