63504012564 has 72 divisors (see below), whose sum is σ = 163604488320. Its totient is φ = 20763372672.

The previous prime is 63504012557. The next prime is 63504012571. The reversal of 63504012564 is 46521040536.

63504012564 is a `hidden beast` number, since 6 + 3 + 50 + 40 + 1 + 2 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (63504012557) and next prime (63504012571).

It is a super-2 number, since 2×63504012564² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 937957 + ... + 1003379.

It is an arithmetic number, because the mean of its divisors is an integer number (2272284560).

Almost surely, 2^63504012564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63504012564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81802244160).

63504012564 is an abundant number, since it is smaller than the sum of its proper divisors (100100475756).

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

63504012564 is a wasteful number, since it uses less digits than its factorization.

63504012564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65949 (or 65944 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 63504012564 in words is "sixty-three billion, five hundred four million, twelve thousand, five hundred sixty-four".