261567596 has 12 divisors (see below), whose sum is σ = 467482848. Its totient is φ = 128001072.

The previous prime is 261567587. The next prime is 261567601. The reversal of 261567596 is 695765162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 261567596.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695471 + ... + 695846.

It is an arithmetic number, because the mean of its divisors is an integer number (38956904).

Almost surely, 2^261567596 is an apocalyptic number.

It is an amenable number.

261567596 is a deficient number, since it is larger than the sum of its proper divisors (205915252).

261567596 is a wasteful number, since it uses less digits than its factorization.

261567596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391368 (or 1391366 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 261567596 is about 16173.0515364294. The cubic root of 261567596 is about 639.5305769988.

The spelling of 261567596 in words is "two hundred sixty-one million, five hundred sixty-seven thousand, five hundred ninety-six".