633399862965972 has 12 divisors (see below), whose sum is σ = 1477933013587296. Its totient is φ = 211133287655320.

The previous prime is 633399862965959. The next prime is 633399862965977. The reversal of 633399862965972 is 279569268993336.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633399862965977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26391660956904 + ... + 26391660956927.

It is an arithmetic number, because the mean of its divisors is an integer number (123161084465608).

Almost surely, 2^{633399862965972} is an apocalyptic number.

It is an amenable number.

633399862965972 is an abundant number, since it is smaller than the sum of its proper divisors (844533150621324).

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

633399862965972 is a wasteful number, since it uses less digits than its factorization.

633399862965972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52783321913838 (or 52783321913836 counting only the distinct ones).

The product of its digits is 42855402240, while the sum is 87.

The spelling of 633399862965972 in words is "six hundred thirty-three trillion, three hundred ninety-nine billion, eight hundred sixty-two million, nine hundred sixty-five thousand, nine hundred seventy-two".