265805064 has 224 divisors, whose sum is σ = 906577920. Its totient is φ = 71290368.

The previous prime is 265805063. The next prime is 265805083. The reversal of 265805064 is 460508562.

265805064 is a `hidden beast` number, since 26 + 580 + 50 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265805063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 693817 + ... + 694199.

Almost surely, 2^265805064 is an apocalyptic number.

265805064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265805064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453288960).

265805064 is an abundant number, since it is smaller than the sum of its proper divisors (640772856).

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

265805064 is a wasteful number, since it uses less digits than its factorization.

265805064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 265805064 is about 16303.5291884917. The cubic root of 265805064 is about 642.9656182663.

The spelling of 265805064 in words is "two hundred sixty-five million, eight hundred five thousand, sixty-four".