264990553 has 4 divisors (see below), whose sum is σ = 271153168. Its totient is φ = 258827940.

The previous prime is 264990547. The next prime is 264990563. The reversal of 264990553 is 355099462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 264990553 - 2¹⁷ = 264859481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 6162571 = 264990553 / (2 + 6 + 4 + 9 + 9 + 0 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264990563) 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 3 ways as a sum of consecutive naturals, for example, 3081243 + ... + 3081328.

It is an arithmetic number, because the mean of its divisors is an integer number (67788292).

Almost surely, 2^264990553 is an apocalyptic number.

It is an amenable number.

264990553 is a deficient number, since it is larger than the sum of its proper divisors (6162615).

264990553 is an equidigital number, since it uses as much as digits as its factorization.

264990553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162614.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 264990553 is about 16278.5304312152. The cubic root of 264990553 is about 642.3081961144.

The spelling of 264990553 in words is "two hundred sixty-four million, nine hundred ninety thousand, five hundred fifty-three".