265243164 has 96 divisors (see below), whose sum is σ = 664614720. Its totient is φ = 82188288.

The previous prime is 265243157. The next prime is 265243171. The reversal of 265243164 is 461342562.

It is an interprime number because it is at equal distance from previous prime (265243157) and next prime (265243171).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1346314 + ... + 1346510.

It is an arithmetic number, because the mean of its divisors is an integer number (6923070).

Almost surely, 2^265243164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265243164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332307360).

265243164 is an abundant number, since it is smaller than the sum of its proper divisors (399371556).

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

265243164 is a wasteful number, since it uses less digits than its factorization.

265243164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 357 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 265243164 is about 16286.2876064498. The cubic root of 265243164 is about 642.5122317969.

The spelling of 265243164 in words is "two hundred sixty-five million, two hundred forty-three thousand, one hundred sixty-four".