63691949399039 has 48 divisors (see below), whose sum is σ = 73682547868800. Its totient is φ = 54836200194048.

The previous prime is 63691949399027. The next prime is 63691949399053. The reversal of 63691949399039 is 93099394919636.

It is not a de Polignac number, because 63691949399039 - 2²⁸ = 63691680963583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63691949399339) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3223430042 + ... + 3223449800.

It is an arithmetic number, because the mean of its divisors is an integer number (1535053080600).

Almost surely, 2^{63691949399039} is an apocalyptic number.

63691949399039 is a deficient number, since it is larger than the sum of its proper divisors (9990598469761).

63691949399039 is a wasteful number, since it uses less digits than its factorization.

63691949399039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29844 (or 29831 counting only the distinct ones).

The product of its (nonzero) digits is 2066242608, while the sum is 80.

The spelling of 63691949399039 in words is "sixty-three trillion, six hundred ninety-one billion, nine hundred forty-nine million, three hundred ninety-nine thousand, thirty-nine".