63977552 has 20 divisors (see below), whose sum is σ = 127956096. Its totient is φ = 30956640.

The previous prime is 63977539. The next prime is 63977609. The reversal of 63977552 is 25577936.

63977552 is an admirable number.

It is a congruent number.

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, 63998 + ... + 64989.

Almost surely, 2^63977552 is an apocalyptic number.

63977552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

63977552 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

63977552 is a wasteful number, since it uses less digits than its factorization.

63977552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129026 (or 129020 counting only the distinct ones).

The product of its digits is 396900, while the sum is 44.

The square root of 63977552 is about 7998.5968769529. The cubic root of 63977552 is about 399.9532278645.

The spelling of 63977552 in words is "sixty-three million, nine hundred seventy-seven thousand, five hundred fifty-two".