264720646 has 4 divisors (see below), whose sum is σ = 397080972. Its totient is φ = 132360322.

The previous prime is 264720611. The next prime is 264720649. The reversal of 264720646 is 646027462.

264720646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264720649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66180160 + ... + 66180163.

It is an arithmetic number, because the mean of its divisors is an integer number (99270243).

Almost surely, 2^264720646 is an apocalyptic number.

264720646 is a deficient number, since it is larger than the sum of its proper divisors (132360326).

264720646 is a wasteful number, since it uses less digits than its factorization.

264720646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132360325.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 264720646 is about 16270.2380437411. The cubic root of 264720646 is about 642.0900469897.

The spelling of 264720646 in words is "two hundred sixty-four million, seven hundred twenty thousand, six hundred forty-six".