264440261261645 has 128 divisors (see below), whose sum is σ = 390380083200000. Its totient is φ = 167947002961920.

The previous prime is 264440261261593. The next prime is 264440261261731. The reversal of 264440261261645 is 546162162044462.

264440261261645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 264440261261645 - 2⁸ = 264440261261389 is a prime.

It is a super-3 number, since 3×264440261261645³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4213954589 + ... + 4214017341.

It is an arithmetic number, because the mean of its divisors is an integer number (3049844400000).

Almost surely, 2^{264440261261645} is an apocalyptic number.

It is an amenable number.

264440261261645 is a deficient number, since it is larger than the sum of its proper divisors (125939821938355).

264440261261645 is a wasteful number, since it uses less digits than its factorization.

264440261261645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63603.

The product of its (nonzero) digits is 13271040, while the sum is 53.

The spelling of 264440261261645 in words is "two hundred sixty-four trillion, four hundred forty billion, two hundred sixty-one million, two hundred sixty-one thousand, six hundred forty-five".