68881442578052 has 12 divisors (see below), whose sum is σ = 129815026397196. Its totient is φ = 31791435036000.

The previous prime is 68881442578037. The next prime is 68881442578079. The reversal of 68881442578052 is 25087524418886.

It can be written as a sum of positive squares in 2 ways, for example, as 29100241847296 + 39781200730756 = 5394464^2 + 6307234^2 .

It is a super-2 number, since 2×68881442578052² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662321563199 + ... + 662321563302.

It is an arithmetic number, because the mean of its divisors is an integer number (10817918866433).

Almost surely, 2^{68881442578052} is an apocalyptic number.

It is an amenable number.

68881442578052 is a deficient number, since it is larger than the sum of its proper divisors (60933583819144).

68881442578052 is a wasteful number, since it uses less digits than its factorization.

68881442578052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324643126518 (or 1324643126516 counting only the distinct ones).

The product of its (nonzero) digits is 275251200, while the sum is 68.

The spelling of 68881442578052 in words is "sixty-eight trillion, eight hundred eighty-one billion, four hundred forty-two million, five hundred seventy-eight thousand, fifty-two".