63931019690 has 16 divisors (see below), whose sum is σ = 121132458720. Its totient is φ = 24226491600.

The previous prime is 63931019653. The next prime is 63931019699. The reversal of 63931019690 is 9691013936.

It is a super-2 number, since 2×63931019690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63931019699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168239336 + ... + 168239715.

It is an arithmetic number, because the mean of its divisors is an integer number (7570778670).

Almost surely, 2^63931019690 is an apocalyptic number.

63931019690 is a deficient number, since it is larger than the sum of its proper divisors (57201439030).

63931019690 is a wasteful number, since it uses less digits than its factorization.

63931019690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336479077.

The product of its (nonzero) digits is 236196, while the sum is 47.

The spelling of 63931019690 in words is "sixty-three billion, nine hundred thirty-one million, nineteen thousand, six hundred ninety".