264640822279 has 4 divisors (see below), whose sum is σ = 264655817640. Its totient is φ = 264625826920.

The previous prime is 264640822219. The next prime is 264640822283. The reversal of 264640822279 is 972228046462.

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 264640822279 - 2⁷ = 264640822151 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 (264640822219) 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, 7471177 + ... + 7506514.

It is an arithmetic number, because the mean of its divisors is an integer number (66163954410).

Almost surely, 2^264640822279 is an apocalyptic number.

264640822279 is a deficient number, since it is larger than the sum of its proper divisors (14995361).

264640822279 is a wasteful number, since it uses less digits than its factorization.

264640822279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14995360.

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 264640822279 in words is "two hundred sixty-four billion, six hundred forty million, eight hundred twenty-two thousand, two hundred seventy-nine".