268358491378 has 64 divisors (see below), whose sum is σ = 433159060320. Its totient is φ = 124456550400.

The previous prime is 268358491369. The next prime is 268358491397. The reversal of 268358491378 is 873194853862.

It can be written as a sum of positive squares in 16 ways, for example, as 49224965689 + 219133525689 = 221867^2 + 468117^2 .

It is a super-2 number, since 2×268358491378² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42184918 + ... + 42191278.

Almost surely, 2^268358491378 is an apocalyptic number.

268358491378 is a deficient number, since it is larger than the sum of its proper divisors (164800568942).

268358491378 is a wasteful number, since it uses less digits than its factorization.

268358491378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703.

The product of its digits is 69672960, while the sum is 64.

The spelling of 268358491378 in words is "two hundred sixty-eight billion, three hundred fifty-eight million, four hundred ninety-one thousand, three hundred seventy-eight".