265404221016 has 64 divisors (see below), whose sum is σ = 723980678400. Its totient is φ = 80408745600.

The previous prime is 265404220987. The next prime is 265404221021. The reversal of 265404221016 is 610122404562.

265404221016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 1193581 + ... + 1398371.

It is an arithmetic number, because the mean of its divisors is an integer number (11312198100).

Almost surely, 2^265404221016 is an apocalyptic number.

It is an amenable number.

265404221016 is an abundant number, since it is smaller than the sum of its proper divisors (458576457384).

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

265404221016 is a wasteful number, since it uses less digits than its factorization.

265404221016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209720 (or 209716 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

Adding to 265404221016 its reverse (610122404562), we get a palindrome (875526625578).

The spelling of 265404221016 in words is "two hundred sixty-five billion, four hundred four million, two hundred twenty-one thousand, sixteen".