264441121560261 has 16 divisors (see below), whose sum is σ = 392397523790400. Its totient is φ = 176009276374704.

The previous prime is 264441121560227. The next prime is 264441121560293. The reversal of 264441121560261 is 162065121144462.

264441121560261 is a `hidden beast` number, since 2 + 6 + 4 + 4 + 4 + 1 + 1 + 21 + 560 + 2 + 61 = 666.

It is not a de Polignac number, because 264441121560261 - 2²⁷ = 264440987342533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264441121567261) 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, 7911223686 + ... + 7911257111.

It is an arithmetic number, because the mean of its divisors is an integer number (24524845236900).

Almost surely, 2^{264441121560261} is an apocalyptic number.

It is an amenable number.

264441121560261 is a deficient number, since it is larger than the sum of its proper divisors (127956402230139).

264441121560261 is a wasteful number, since it uses less digits than its factorization.

264441121560261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15822481425 (or 15822481419 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 264441121560261 in words is "two hundred sixty-four trillion, four hundred forty-one billion, one hundred twenty-one million, five hundred sixty thousand, two hundred sixty-one".