264497643 has 10 divisors (see below), whose sum is σ = 395113884. Its totient is φ = 176331708.

The previous prime is 264497599. The next prime is 264497659. The reversal of 264497643 is 346794462.

It is a happy number.

It is not a de Polignac number, because 264497643 - 2⁶ = 264497579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (264497663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1632621 + ... + 1632782.

Almost surely, 2^264497643 is an apocalyptic number.

264497643 is a deficient number, since it is larger than the sum of its proper divisors (130616241).

264497643 is an equidigital number, since it uses as much as digits as its factorization.

264497643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265415 (or 3265406 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 264497643 is about 16263.3835040560. The cubic root of 264497643 is about 641.9096955697.

The spelling of 264497643 in words is "two hundred sixty-four million, four hundred ninety-seven thousand, six hundred forty-three".