261464655 has 8 divisors (see below), whose sum is σ = 418343472. Its totient is φ = 139447808.

The previous prime is 261464653. The next prime is 261464663. The reversal of 261464655 is 556464162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261464655 - 2¹ = 261464653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261464653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8715474 + ... + 8715503.

It is an arithmetic number, because the mean of its divisors is an integer number (52292934).

Almost surely, 2^261464655 is an apocalyptic number.

261464655 is a deficient number, since it is larger than the sum of its proper divisors (156878817).

261464655 is a wasteful number, since it uses less digits than its factorization.

261464655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17430985.

The product of its digits is 172800, while the sum is 39.

The square root of 261464655 is about 16169.8687378717. The cubic root of 261464655 is about 639.4466693635.

The spelling of 261464655 in words is "two hundred sixty-one million, four hundred sixty-four thousand, six hundred fifty-five".