63497664 has 84 divisors (see below), whose sum is σ = 189957456. Its totient is φ = 20241408.

The previous prime is 63497653. The next prime is 63497671. The reversal of 63497664 is 46679436.

63497664 is a `hidden beast` number, since 634 + 9 + 7 + 6 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10852 + ... + 15644.

Almost surely, 2^63497664 is an apocalyptic number.

63497664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63497664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94978728).

63497664 is an abundant number, since it is smaller than the sum of its proper divisors (126459792).

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

63497664 is a wasteful number, since it uses less digits than its factorization.

63497664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834 (or 4821 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 63497664 is about 7968.5421502305. The cubic root of 63497664 is about 398.9507165842.

The spelling of 63497664 in words is "sixty-three million, four hundred ninety-seven thousand, six hundred sixty-four".