265534064081 has 16 divisors (see below), whose sum is σ = 312091479168. Its totient is φ = 222729091200.

The previous prime is 265534064057. The next prime is 265534064113. The reversal of 265534064081 is 180460435562.

It is not a de Polignac number, because 265534064081 - 2⁶ = 265534064017 is a prime.

It is a super-2 number, since 2×265534064081² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (265534064051) 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, 71276 + ... + 732221.

It is an arithmetic number, because the mean of its divisors is an integer number (19505717448).

Almost surely, 2^265534064081 is an apocalyptic number.

It is an amenable number.

265534064081 is a deficient number, since it is larger than the sum of its proper divisors (46557415087).

265534064081 is a wasteful number, since it uses less digits than its factorization.

265534064081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805832.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 265534064081 in words is "two hundred sixty-five billion, five hundred thirty-four million, sixty-four thousand, eighty-one".