264640651 has 8 divisors (see below), whose sum is σ = 288816624. Its totient is φ = 240484320.

The previous prime is 264640633. The next prime is 264640661. The reversal of 264640651 is 156046462.

264640651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264640651 - 2¹¹ = 264638603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264640601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51181 + ... + 56113.

It is an arithmetic number, because the mean of its divisors is an integer number (36102078).

Almost surely, 2^264640651 is an apocalyptic number.

264640651 is a deficient number, since it is larger than the sum of its proper divisors (24175973).

264640651 is a wasteful number, since it uses less digits than its factorization.

264640651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 264640651 is about 16267.7795350195. The cubic root of 264640651 is about 642.0253634969.

The spelling of 264640651 in words is "two hundred sixty-four million, six hundred forty thousand, six hundred fifty-one".