63401856 has 128 divisors (see below), whose sum is σ = 195187200. Its totient is φ = 17860608.

The previous prime is 63401843. The next prime is 63401881. The reversal of 63401856 is 65810436.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276750 + ... + 276978.

It is an arithmetic number, because the mean of its divisors is an integer number (1524900).

Almost surely, 2^63401856 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 63401856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97593600).

63401856 is an abundant number, since it is smaller than the sum of its proper divisors (131785344).

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

63401856 is a wasteful number, since it uses less digits than its factorization.

63401856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 63401856 is about 7962.5282417082. The cubic root of 63401856 is about 398.7499642627.

The spelling of 63401856 in words is "sixty-three million, four hundred one thousand, eight hundred fifty-six".