630964161 has 15 divisors (see below), whose sum is σ = 942889233. Its totient is φ = 420492060.

The previous prime is 630964153. The next prime is 630964171. The reversal of 630964161 is 161469036.

The square root of 630964161 is 25119.

It is a perfect power (a square), and thus also a powerful number.

630964161 is a `hidden beast` number, since 6 + 3 + 0 + 9 + 641 + 6 + 1 = 666.

It is not a de Polignac number, because 630964161 - 2³ = 630964153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (630964121) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 224676 + ... + 227466.

Almost surely, 2^630964161 is an apocalyptic number.

630964161 is the 25119-th square number.

630964161 is the 12560-th centered octagonal number.

It is an amenable number.

630964161 is a deficient number, since it is larger than the sum of its proper divisors (311925072).

630964161 is an frugal number, since it uses more digits than its factorization.

630964161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5594 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The cubic root of 630964161 is about 857.6989872730.

Multiplying 630964161 by its sum of digits (36), we get a square (22714709796 = 150714²).

The spelling of 630964161 in words is "six hundred thirty million, nine hundred sixty-four thousand, one hundred sixty-one".