264721644125 has 16 divisors (see below), whose sum is σ = 341029797888. Its totient is φ = 204945786000.

The previous prime is 264721644119. The next prime is 264721644149. The reversal of 264721644125 is 521446127462.

It is a happy number.

It is not a de Polignac number, because 264721644125 - 2¹⁰ = 264721643101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34153757 + ... + 34161506.

It is an arithmetic number, because the mean of its divisors is an integer number (21314362368).

Almost surely, 2^264721644125 is an apocalyptic number.

264721644125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

264721644125 is a deficient number, since it is larger than the sum of its proper divisors (76308153763).

264721644125 is an equidigital number, since it uses as much as digits as its factorization.

264721644125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68315309 (or 68315299 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The spelling of 264721644125 in words is "two hundred sixty-four billion, seven hundred twenty-one million, six hundred forty-four thousand, one hundred twenty-five".