264253644620 has 96 divisors (see below), whose sum is σ = 643820956800. Its totient is φ = 89231652864.

The previous prime is 264253644617. The next prime is 264253644643. The reversal of 264253644620 is 26446352462.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7227746 + ... + 7264214.

It is an arithmetic number, because the mean of its divisors is an integer number (6706468300).

Almost surely, 2^264253644620 is an apocalyptic number.

264253644620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264253644620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321910478400).

264253644620 is an abundant number, since it is smaller than the sum of its proper divisors (379567312180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264253644620 is a wasteful number, since it uses less digits than its factorization.

264253644620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37267 (or 37265 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 44.

The spelling of 264253644620 in words is "two hundred sixty-four billion, two hundred fifty-three million, six hundred forty-four thousand, six hundred twenty".