63631761645 has 48 divisors (see below), whose sum is σ = 103967496576. Its totient is φ = 33231408000.

The previous prime is 63631761637. The next prime is 63631761689. The reversal of 63631761645 is 54616713636.

It is not a de Polignac number, because 63631761645 - 2³ = 63631761637 is a prime.

It is a super-3 number, since 3×63631761645³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63631761594 and 63631761603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11415079 + ... + 11420651.

It is an arithmetic number, because the mean of its divisors is an integer number (2165989512).

Almost surely, 2^63631761645 is an apocalyptic number.

It is an amenable number.

63631761645 is a deficient number, since it is larger than the sum of its proper divisors (40335734931).

63631761645 is a wasteful number, since it uses less digits than its factorization.

63631761645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874 (or 5803 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 48.

The spelling of 63631761645 in words is "sixty-three billion, six hundred thirty-one million, seven hundred sixty-one thousand, six hundred forty-five".