265516540 has 24 divisors (see below), whose sum is σ = 590384592. Its totient is φ = 99959040.

The previous prime is 265516513. The next prime is 265516553. The reversal of 265516540 is 45615562.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 265516496 and 265516505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390126 + ... + 390805.

It is an arithmetic number, because the mean of its divisors is an integer number (24599358).

Almost surely, 2^265516540 is an apocalyptic number.

265516540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265516540 is an abundant number, since it is smaller than the sum of its proper divisors (324868052).

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

265516540 is a wasteful number, since it uses less digits than its factorization.

265516540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780957 (or 780955 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 265516540 is about 16294.6782723686. The cubic root of 265516540 is about 642.7328936120.

The spelling of 265516540 in words is "two hundred sixty-five million, five hundred sixteen thousand, five hundred forty".