265493989015 has 4 divisors (see below), whose sum is σ = 318592786824. Its totient is φ = 212395191208.

The previous prime is 265493989009. The next prime is 265493989043. The reversal of 265493989015 is 510989394562.

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 265493989015 - 2⁵ = 265493988983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26549398897 + ... + 26549398906.

It is an arithmetic number, because the mean of its divisors is an integer number (79648196706).

Almost surely, 2^265493989015 is an apocalyptic number.

265493989015 is a deficient number, since it is larger than the sum of its proper divisors (53098797809).

265493989015 is an equidigital number, since it uses as much as digits as its factorization.

265493989015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53098797808.

The product of its (nonzero) digits is 20995200, while the sum is 61.

The spelling of 265493989015 in words is "two hundred sixty-five billion, four hundred ninety-three million, nine hundred eighty-nine thousand, fifteen".