265142513511261 has 12 divisors (see below), whose sum is σ = 383010817836192. Its totient is φ = 176749127731656.

The previous prime is 265142513511193. The next prime is 265142513511283. The reversal of 265142513511261 is 162115315241562.

265142513511261 is a `hidden beast` number, since 2 + 6 + 5 + 1 + 4 + 2 + 513 + 5 + 1 + 126 + 1 = 666.

It is not a de Polignac number, because 265142513511261 - 2⁷ = 265142513511133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265142513511961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1045528051 + ... + 1045781616.

It is an arithmetic number, because the mean of its divisors is an integer number (31917568153016).

Almost surely, 2^{265142513511261} is an apocalyptic number.

It is an amenable number.

265142513511261 is a deficient number, since it is larger than the sum of its proper divisors (117868304324931).

265142513511261 is a wasteful number, since it uses less digits than its factorization.

265142513511261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091323760 (or 2091323757 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 265142513511261 in words is "two hundred sixty-five trillion, one hundred forty-two billion, five hundred thirteen million, five hundred eleven thousand, two hundred sixty-one".