268400860686 has 32 divisors (see below), whose sum is σ = 681652980480. Its totient is φ = 76685960088.

The previous prime is 268400860643. The next prime is 268400860753. The reversal of 268400860686 is 686068004862.

It is a happy number.

268400860686 is a `hidden beast` number, since 26 + 8 + 4 + 0 + 0 + 8 + 606 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355027216 + ... + 355027971.

It is an arithmetic number, because the mean of its divisors is an integer number (21301655640).

Almost surely, 2^268400860686 is an apocalyptic number.

268400860686 is an abundant number, since it is smaller than the sum of its proper divisors (413252119794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

268400860686 is a wasteful number, since it uses less digits than its factorization.

268400860686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710055205 (or 710055199 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The spelling of 268400860686 in words is "two hundred sixty-eight billion, four hundred million, eight hundred sixty thousand, six hundred eighty-six".