264401634555615 has 128 divisors (see below), whose sum is σ = 456197877080064. Its totient is φ = 130505296896000.

The previous prime is 264401634555563. The next prime is 264401634555647. The reversal of 264401634555615 is 516555436104462.

It is not a de Polignac number, because 264401634555615 - 2¹⁰ = 264401634554591 is a prime.

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, 1108338900 + ... + 1108577430.

It is an arithmetic number, because the mean of its divisors is an integer number (3564045914688).

Almost surely, 2^{264401634555615} is an apocalyptic number.

264401634555615 is a deficient number, since it is larger than the sum of its proper divisors (191796242524449).

264401634555615 is a wasteful number, since it uses less digits than its factorization.

264401634555615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239761.

The product of its (nonzero) digits is 51840000, while the sum is 57.

The spelling of 264401634555615 in words is "two hundred sixty-four trillion, four hundred one billion, six hundred thirty-four million, five hundred fifty-five thousand, six hundred fifteen".