265555136123 has 2 divisors, whose sum is σ = 265555136124. Its totient is φ = 265555136122.

The previous prime is 265555136083. The next prime is 265555136141. The reversal of 265555136123 is 321631555562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265555136123 - 2²² = 265550941819 is a prime.

It is a super-2 number, since 2×265555136123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (265555136153) 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 as a sum of consecutive naturals, namely, 132777568061 + 132777568062.

It is an arithmetic number, because the mean of its divisors is an integer number (132777568062).

Almost surely, 2^265555136123 is an apocalyptic number.

265555136123 is a deficient number, since it is larger than the sum of its proper divisors (1).

265555136123 is an equidigital number, since it uses as much as digits as its factorization.

265555136123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810000, while the sum is 44.

The spelling of 265555136123 in words is "two hundred sixty-five billion, five hundred fifty-five million, one hundred thirty-six thousand, one hundred twenty-three".