630765261 has 24 divisors (see below), whose sum is σ = 1045249920. Its totient is φ = 359057376.

The previous prime is 630765257. The next prime is 630765293. The reversal of 630765261 is 162567036.

630765261 is a `hidden beast` number, since 63 + 0 + 76 + 526 + 1 = 666.

It is not a de Polignac number, because 630765261 - 2² = 630765257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630765221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2466 + ... + 35603.

It is an arithmetic number, because the mean of its divisors is an integer number (43552080).

Almost surely, 2^630765261 is an apocalyptic number.

It is an amenable number.

630765261 is a deficient number, since it is larger than the sum of its proper divisors (414484659).

630765261 is a wasteful number, since it uses less digits than its factorization.

630765261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38345 (or 38342 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 630765261 is about 25115.0405335130. The cubic root of 630765261 is about 857.6088531217.

The spelling of 630765261 in words is "six hundred thirty million, seven hundred sixty-five thousand, two hundred sixty-one".