268439905454136 has 128 divisors (see below), whose sum is σ = 745265926379520. Its totient is φ = 80054663169024.

The previous prime is 268439905454113. The next prime is 268439905454221. The reversal of 268439905454136 is 631454509934862.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87353925 + ... + 90374708.

It is an arithmetic number, because the mean of its divisors is an integer number (5822390049840).

Almost surely, 2^{268439905454136} is an apocalyptic number.

268439905454136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

268439905454136 is an abundant number, since it is smaller than the sum of its proper divisors (476826020925384).

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

268439905454136 is a wasteful number, since it uses less digits than its factorization.

268439905454136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177728805 (or 177728801 counting only the distinct ones).

The product of its (nonzero) digits is 671846400, while the sum is 69.

The spelling of 268439905454136 in words is "two hundred sixty-eight trillion, four hundred thirty-nine billion, nine hundred five million, four hundred fifty-four thousand, one hundred thirty-six".