265531053840 has 80 divisors (see below), whose sum is σ = 886465220928. Its totient is φ = 65361489408.

The previous prime is 265531053833. The next prime is 265531053923. The reversal of 265531053840 is 48350135562.

265531053840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 265531053792 and 265531053801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42549934 + ... + 42556173.

Almost surely, 2^265531053840 is an apocalyptic number.

265531053840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265531053840 is an abundant number, since it is smaller than the sum of its proper divisors (620934167088).

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

265531053840 is a wasteful number, since it uses less digits than its factorization.

265531053840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85106136 (or 85106130 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 265531053840 in words is "two hundred sixty-five billion, five hundred thirty-one million, fifty-three thousand, eight hundred forty".