63397385856 has 256 divisors, whose sum is σ = 216487084800. Its totient is φ = 18112978944.

The previous prime is 63397385801. The next prime is 63397385911. The reversal of 63397385856 is 65858379336.

It is an interprime number because it is at equal distance from previous prime (63397385801) and next prime (63397385911).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 63397385793 and 63397385802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1943376 + ... + 1975728.

It is an arithmetic number, because the mean of its divisors is an integer number (845652675).

Almost surely, 2^63397385856 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 63397385856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108243542400).

63397385856 is an abundant number, since it is smaller than the sum of its proper divisors (153089698944).

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

63397385856 is an frugal number, since it uses more digits than its factorization.

63397385856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32395 (or 32365 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 63.

The spelling of 63397385856 in words is "sixty-three billion, three hundred ninety-seven million, three hundred eighty-five thousand, eight hundred fifty-six".