63557074944 has 456 divisors, whose sum is σ = 209379256320. Its totient is φ = 18402508800.

The previous prime is 63557074937. The next prime is 63557074961. The reversal of 63557074944 is 44947075536.

63557074944 is a `hidden beast` number, since 6 + 3 + 557 + 0 + 7 + 49 + 44 = 666.

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, 804519897 + ... + 804519975.

Almost surely, 2^63557074944 is an apocalyptic number.

63557074944 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 63557074944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104689628160).

63557074944 is an abundant number, since it is smaller than the sum of its proper divisors (145822181376).

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

63557074944 is an equidigital number, since it uses as much as digits as its factorization.

63557074944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 54.

The spelling of 63557074944 in words is "sixty-three billion, five hundred fifty-seven million, seventy-four thousand, nine hundred forty-four".