68268542436 has 18 divisors (see below), whose sum is σ = 172567704582. Its totient is φ = 22756180800.

The previous prime is 68268542371. The next prime is 68268542453. The reversal of 68268542436 is 63424586286.

It is a happy number.

68268542436 is a `hidden beast` number, since 6 + 8 + 2 + 68 + 542 + 4 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67032316836 + 1236225600 = 258906^2 + 35160^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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, 948174165 + ... + 948174236.

It is an arithmetic number, because the mean of its divisors is an integer number (9587094699).

Almost surely, 2^68268542436 is an apocalyptic number.

It is an amenable number.

68268542436 is an abundant number, since it is smaller than the sum of its proper divisors (104299162146).

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

68268542436 is a wasteful number, since it uses less digits than its factorization.

68268542436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896348411 (or 1896348406 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 54.

The spelling of 68268542436 in words is "sixty-eight billion, two hundred sixty-eight million, five hundred forty-two thousand, four hundred thirty-six".