264324136621 has 4 divisors (see below), whose sum is σ = 266074627744. Its totient is φ = 262573645500.

The previous prime is 264324136541. The next prime is 264324136627. The reversal of 264324136621 is 126631423462.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126631423462 = 2 ⋅63315711731.

It is a cyclic number.

It is not a de Polignac number, because 264324136621 - 2¹³ = 264324128429 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 (264324136627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875245335 + ... + 875245636.

It is an arithmetic number, because the mean of its divisors is an integer number (66518656936).

Almost surely, 2^264324136621 is an apocalyptic number.

It is an amenable number.

264324136621 is a deficient number, since it is larger than the sum of its proper divisors (1750491123).

264324136621 is a wasteful number, since it uses less digits than its factorization.

264324136621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750491122.

The product of its digits is 248832, while the sum is 40.

The spelling of 264324136621 in words is "two hundred sixty-four billion, three hundred twenty-four million, one hundred thirty-six thousand, six hundred twenty-one".