265016561455531 has 16 divisors (see below), whose sum is σ = 265532790878208. Its totient is φ = 264500919540000.

The previous prime is 265016561455519. The next prime is 265016561455549. The reversal of 265016561455531 is 135554165610562.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265016561455531 is a prime.

It is a super-2 number, since 2×265016561455531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265016561455501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8268573456 + ... + 8268605506.

It is an arithmetic number, because the mean of its divisors is an integer number (16595799429888).

Almost surely, 2^{265016561455531} is an apocalyptic number.

265016561455531 is a deficient number, since it is larger than the sum of its proper divisors (516229422677).

265016561455531 is a wasteful number, since it uses less digits than its factorization.

265016561455531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40722.

The product of its (nonzero) digits is 16200000, while the sum is 55.

The spelling of 265016561455531 in words is "two hundred sixty-five trillion, sixteen billion, five hundred sixty-one million, four hundred fifty-five thousand, five hundred thirty-one".