63997361901 has 16 divisors (see below), whose sum is σ = 103430080320. Its totient is φ = 38786279760.

The previous prime is 63997361867. The next prime is 63997361921. The reversal of 63997361901 is 10916379936.

It is not a de Polignac number, because 63997361901 - 2²² = 63993167597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63997361921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107739370 + ... + 107739963.

It is an arithmetic number, because the mean of its divisors is an integer number (6464380020).

Almost surely, 2^63997361901 is an apocalyptic number.

It is an amenable number.

63997361901 is a deficient number, since it is larger than the sum of its proper divisors (39432718419).

63997361901 is a wasteful number, since it uses less digits than its factorization.

63997361901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215479353 (or 215479347 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 54.

The spelling of 63997361901 in words is "sixty-three billion, nine hundred ninety-seven million, three hundred sixty-one thousand, nine hundred one".