262655091991 has 4 divisors (see below), whose sum is σ = 262657832800. Its totient is φ = 262652351184.

The previous prime is 262655091977. The next prime is 262655092033. The reversal of 262655091991 is 199190556262.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 262655091991 - 2²⁷ = 262520874263 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 (262655091911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221246 + ... + 1420123.

It is an arithmetic number, because the mean of its divisors is an integer number (65664458200).

Almost surely, 2^262655091991 is an apocalyptic number.

262655091991 is a deficient number, since it is larger than the sum of its proper divisors (2740809).

262655091991 is an equidigital number, since it uses as much as digits as its factorization.

262655091991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2740808.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 262655091991 in words is "two hundred sixty-two billion, six hundred fifty-five million, ninety-one thousand, nine hundred ninety-one".