265216128 has 64 divisors (see below), whose sum is σ = 735134400. Its totient is φ = 84558848.

The previous prime is 265216109. The next prime is 265216141. The reversal of 265216128 is 821612562.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6183 + ... + 23846.

It is an arithmetic number, because the mean of its divisors is an integer number (11486475).

Almost surely, 2^265216128 is an apocalyptic number.

It is an amenable number.

265216128 is an abundant number, since it is smaller than the sum of its proper divisors (469918272).

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

265216128 is a wasteful number, since it uses less digits than its factorization.

265216128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30069 (or 30057 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 265216128 is about 16285.4575618863. The cubic root of 265216128 is about 642.4904008215.

The spelling of 265216128 in words is "two hundred sixty-five million, two hundred sixteen thousand, one hundred twenty-eight".