265651555291 has 2 divisors, whose sum is σ = 265651555292. Its totient is φ = 265651555290.

The previous prime is 265651555259. The next prime is 265651555387. The reversal of 265651555291 is 192555156562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265651555291 - 2⁵ = 265651555259 is a prime.

It is not a weakly prime, because it can be changed into another prime (265651553291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132825777645 + 132825777646.

It is an arithmetic number, because the mean of its divisors is an integer number (132825777646).

Almost surely, 2^265651555291 is an apocalyptic number.

265651555291 is a deficient number, since it is larger than the sum of its proper divisors (1).

265651555291 is an equidigital number, since it uses as much as digits as its factorization.

265651555291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050000, while the sum is 52.

The spelling of 265651555291 in words is "two hundred sixty-five billion, six hundred fifty-one million, five hundred fifty-five thousand, two hundred ninety-one".