268990073856 has 264 divisors, whose sum is σ = 926683286640. Its totient is φ = 76853919744.

The previous prime is 268990073843. The next prime is 268990073861. The reversal of 268990073856 is 658370099862.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 268990073793 and 268990073802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1255476 + ... + 1454028.

Almost surely, 2^268990073856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268990073856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463341643320).

268990073856 is an abundant number, since it is smaller than the sum of its proper divisors (657693212784).

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

268990073856 is a wasteful number, since it uses less digits than its factorization.

268990073856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198596 (or 198565 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 268990073856 in words is "two hundred sixty-eight billion, nine hundred ninety million, seventy-three thousand, eight hundred fifty-six".