261464183368 has 16 divisors (see below), whose sum is σ = 498282153660. Its totient is φ = 128588942400.

The previous prime is 261464183327. The next prime is 261464183369. The reversal of 261464183368 is 863381464162.

It can be written as a sum of positive squares in 2 ways, for example, as 164059021764 + 97405161604 = 405042^2 + 312098^2 .

It is not an unprimeable number, because it can be changed into a prime (261464183369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267893143 + ... + 267894118.

Almost surely, 2^261464183368 is an apocalyptic number.

It is an amenable number.

261464183368 is a deficient number, since it is larger than the sum of its proper divisors (236817970292).

261464183368 is a wasteful number, since it uses less digits than its factorization.

261464183368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535787328 (or 535787324 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 52.

The spelling of 261464183368 in words is "two hundred sixty-one billion, four hundred sixty-four million, one hundred eighty-three thousand, three hundred sixty-eight".