68139069215 has 16 divisors (see below), whose sum is σ = 93453588480. Its totient is φ = 46721072160.

The previous prime is 68139069199. The next prime is 68139069223. The reversal of 68139069215 is 51296093186.

It is a happy number.

It is not a de Polignac number, because 68139069215 - 2⁴ = 68139069199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633746 + ... + 733424.

It is an arithmetic number, because the mean of its divisors is an integer number (5840849280).

Almost surely, 2^68139069215 is an apocalyptic number.

68139069215 is a deficient number, since it is larger than the sum of its proper divisors (25314519265).

68139069215 is a wasteful number, since it uses less digits than its factorization.

68139069215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119222.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 68139069215 in words is "sixty-eight billion, one hundred thirty-nine million, sixty-nine thousand, two hundred fifteen".