68052086521 has 16 divisors (see below), whose sum is σ = 72741715200. Its totient is φ = 63439158528.

The previous prime is 68052086513. The next prime is 68052086581. The reversal of 68052086521 is 12568025086.

It is a cyclic number.

It is not a de Polignac number, because 68052086521 - 2³ = 68052086513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68052086581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7887616 + ... + 7896238.

It is an arithmetic number, because the mean of its divisors is an integer number (4546357200).

Almost surely, 2^68052086521 is an apocalyptic number.

It is an amenable number.

68052086521 is a deficient number, since it is larger than the sum of its proper divisors (4689628679).

68052086521 is a wasteful number, since it uses less digits than its factorization.

68052086521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13008.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 68052086521 in words is "sixty-eight billion, fifty-two million, eighty-six thousand, five hundred twenty-one".