265271557616 has 40 divisors (see below), whose sum is σ = 554411432064. Its totient is φ = 122231266560.

The previous prime is 265271557583. The next prime is 265271557619. The reversal of 265271557616 is 616755172562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265271557619) 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 in 7 ways as a sum of consecutive naturals, for example, 924275 + ... + 1176786.

Almost surely, 2^265271557616 is an apocalyptic number.

265271557616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

265271557616 is an abundant number, since it is smaller than the sum of its proper divisors (289139874448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265271557616 is a wasteful number, since it uses less digits than its factorization.

265271557616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101689 (or 2101683 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 53.

The spelling of 265271557616 in words is "two hundred sixty-five billion, two hundred seventy-one million, five hundred fifty-seven thousand, six hundred sixteen".