268531518650 has 12 divisors (see below), whose sum is σ = 499468624782. Its totient is φ = 107412607440.

The previous prime is 268531518641. The next prime is 268531518701. The reversal of 268531518650 is 56815135862.

It can be written as a sum of positive squares in 3 ways, for example, as 208813355521 + 59718163129 = 456961^2 + 244373^2 .

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 5370630373 = 268531518650 / (2 + 6 + 8 + 5 + 3 + 1 + 5 + 1 + 8 + 6 + 5 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2685315137 + ... + 2685315236.

Almost surely, 2^268531518650 is an apocalyptic number.

268531518650 is a deficient number, since it is larger than the sum of its proper divisors (230937106132).

268531518650 is a wasteful number, since it uses less digits than its factorization.

268531518650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370630385 (or 5370630380 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 50.

The spelling of 268531518650 in words is "two hundred sixty-eight billion, five hundred thirty-one million, five hundred eighteen thousand, six hundred fifty".