265550256613 has 16 divisors (see below), whose sum is σ = 283034165760. Its totient is φ = 248599144816.

The previous prime is 265550256611. The next prime is 265550256619. The reversal of 265550256613 is 316652055562.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 265550256613 - 2¹ = 265550256611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265550256611) 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, 122995 + ... + 739072.

It is an arithmetic number, because the mean of its divisors is an integer number (17689635360).

Almost surely, 2^265550256613 is an apocalyptic number.

265550256613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

265550256613 is a deficient number, since it is larger than the sum of its proper divisors (17483909147).

265550256613 is a wasteful number, since it uses less digits than its factorization.

265550256613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862376.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 265550256613 in words is "two hundred sixty-five billion, five hundred fifty million, two hundred fifty-six thousand, six hundred thirteen".