501264643 has 18 divisors (see below), whose sum is σ = 558302612. Its totient is φ = 449713440.

The previous prime is 501264613. The next prime is 501264653. The reversal of 501264643 is 346462105.

It is not a de Polignac number, because 501264643 - 2⁵ = 501264611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501264613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 958180 + ... + 958702.

Almost surely, 2^501264643 is an apocalyptic number.

501264643 is a deficient number, since it is larger than the sum of its proper divisors (57037969).

501264643 is an equidigital number, since it uses as much as digits as its factorization.

501264643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 501264643 is about 22388.9401937653. The cubic root of 501264643 is about 794.3691278150.

The spelling of 501264643 in words is "five hundred one million, two hundred sixty-four thousand, six hundred forty-three".