63701321878 has 16 divisors (see below), whose sum is σ = 97874622144. Its totient is φ = 31080470400.

The previous prime is 63701321863. The next prime is 63701321897. The reversal of 63701321878 is 87812310736.

It is a super-2 number, since 2×63701321878² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973773 + ... + 1037128.

It is an arithmetic number, because the mean of its divisors is an integer number (6117163884).

Almost surely, 2^63701321878 is an apocalyptic number.

63701321878 is a deficient number, since it is larger than the sum of its proper divisors (34173300266).

63701321878 is a wasteful number, since it uses less digits than its factorization.

63701321878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011287.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 63701321878 in words is "sixty-three billion, seven hundred one million, three hundred twenty-one thousand, eight hundred seventy-eight".