63440280860 has 48 divisors (see below), whose sum is σ = 145715576832. Its totient is φ = 23008929600.

The previous prime is 63440280857. The next prime is 63440280901. The reversal of 63440280860 is 6808204436.

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, 292196 + ... + 460715.

It is an arithmetic number, because the mean of its divisors is an integer number (3035741184).

Almost surely, 2^63440280860 is an apocalyptic number.

It is an amenable number.

63440280860 is an abundant number, since it is smaller than the sum of its proper divisors (82275295972).

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

63440280860 is a wasteful number, since it uses less digits than its factorization.

63440280860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753314 (or 753312 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 63440280860 in words is "sixty-three billion, four hundred forty million, two hundred eighty thousand, eight hundred sixty".