264440246625551 has 4 divisors (see below), whose sum is σ = 265149201710712. Its totient is φ = 263731291540392.

The previous prime is 264440246625521. The next prime is 264440246625553. The reversal of 264440246625551 is 155526642044462.

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

It is a cyclic number.

It is not a de Polignac number, because 264440246625551 - 2⁶ = 264440246625487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264440246625553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354477542021 + ... + 354477542766.

It is an arithmetic number, because the mean of its divisors is an integer number (66287300427678).

Almost surely, 2^{264440246625551} is an apocalyptic number.

264440246625551 is a deficient number, since it is larger than the sum of its proper divisors (708955085161).

264440246625551 is an equidigital number, since it uses as much as digits as its factorization.

264440246625551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708955085160.

The product of its (nonzero) digits is 55296000, while the sum is 56.

The spelling of 264440246625551 in words is "two hundred sixty-four trillion, four hundred forty billion, two hundred forty-six million, six hundred twenty-five thousand, five hundred fifty-one".