261465716 has 12 divisors (see below), whose sum is σ = 459618432. Its totient is φ = 130146168.

The previous prime is 261465697. The next prime is 261465773. The reversal of 261465716 is 617564162.

It is a self number, because there is not a number n which added to its sum of digits gives 261465716.

It is a congruent number.

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, 145670 + ... + 147453.

It is an arithmetic number, because the mean of its divisors is an integer number (38301536).

Almost surely, 2^261465716 is an apocalyptic number.

It is an amenable number.

261465716 is a deficient number, since it is larger than the sum of its proper divisors (198152716).

261465716 is a wasteful number, since it uses less digits than its factorization.

261465716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293350 (or 293348 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 261465716 is about 16169.9015457732. The cubic root of 261465716 is about 639.4475343013.

The spelling of 261465716 in words is "two hundred sixty-one million, four hundred sixty-five thousand, seven hundred sixteen".