632645665631 has 16 divisors (see below), whose sum is σ = 724509385728. Its totient is φ = 541153807200.

The previous prime is 632645665583. The next prime is 632645665661. The reversal of 632645665631 is 136566546236.

It is a cyclic number.

It is not a de Polignac number, because 632645665631 - 2¹⁸ = 632645403487 is a prime.

It is a super-2 number, since 2×632645665631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632645665661) 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, 22113146 + ... + 22141736.

It is an arithmetic number, because the mean of its divisors is an integer number (45281836608).

Almost surely, 2^632645665631 is an apocalyptic number.

632645665631 is a deficient number, since it is larger than the sum of its proper divisors (91863720097).

632645665631 is a wasteful number, since it uses less digits than its factorization.

632645665631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34982.

The product of its digits is 13996800, while the sum is 53.

The spelling of 632645665631 in words is "six hundred thirty-two billion, six hundred forty-five million, six hundred sixty-five thousand, six hundred thirty-one".