265136990620 has 24 divisors (see below), whose sum is σ = 562193390304. Its totient is φ = 105025137216.

The previous prime is 265136990551. The next prime is 265136990627. The reversal of 265136990620 is 26099631562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265136990627) 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, 64351579 + ... + 64355698.

It is an arithmetic number, because the mean of its divisors is an integer number (23424724596).

Almost surely, 2^265136990620 is an apocalyptic number.

265136990620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265136990620 is an abundant number, since it is smaller than the sum of its proper divisors (297056399684).

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

265136990620 is a wasteful number, since it uses less digits than its factorization.

265136990620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128707389 (or 128707387 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 49.

The spelling of 265136990620 in words is "two hundred sixty-five billion, one hundred thirty-six million, nine hundred ninety thousand, six hundred twenty".