264406554015261 has 16 divisors (see below), whose sum is σ = 403434667010688. Its totient is φ = 150890918745600.

The previous prime is 264406554015259. The next prime is 264406554015271. The reversal of 264406554015261 is 162510455604462.

It is not a de Polignac number, because 264406554015261 - 2¹ = 264406554015259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264406554015271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8272512460 + ... + 8272544421.

It is an arithmetic number, because the mean of its divisors is an integer number (25214666688168).

Almost surely, 2^{264406554015261} is an apocalyptic number.

264406554015261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

264406554015261 is a deficient number, since it is larger than the sum of its proper divisors (139028112995427).

264406554015261 is a wasteful number, since it uses less digits than its factorization.

264406554015261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16545057652.

The product of its (nonzero) digits is 6912000, while the sum is 51.

The spelling of 264406554015261 in words is "two hundred sixty-four trillion, four hundred six billion, five hundred fifty-four million, fifteen thousand, two hundred sixty-one".