632423661 has 16 divisors (see below), whose sum is σ = 876997440. Its totient is φ = 405054720.

The previous prime is 632423641. The next prime is 632423669. The reversal of 632423661 is 166324236.

It is a de Polignac number, because none of the positive numbers 2^k-632423661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632423669) 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, 32316 + ... + 48053.

It is an arithmetic number, because the mean of its divisors is an integer number (54812340).

Almost surely, 2^632423661 is an apocalyptic number.

632423661 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

632423661 is a deficient number, since it is larger than the sum of its proper divisors (244573779).

632423661 is a wasteful number, since it uses less digits than its factorization.

632423661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80476.

The product of its digits is 31104, while the sum is 33.

The square root of 632423661 is about 25148.0349331712. The cubic root of 632423661 is about 858.3598001411.

Adding to 632423661 its reverse (166324236), we get a palindrome (798747897).

The spelling of 632423661 in words is "six hundred thirty-two million, four hundred twenty-three thousand, six hundred sixty-one".