68515826315 has 16 divisors (see below), whose sum is σ = 84315228480. Its totient is φ = 53418055680.

The previous prime is 68515826311. The next prime is 68515826363. The reversal of 68515826315 is 51362851586.

It is not a de Polignac number, because 68515826315 - 2² = 68515826311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68515826311) 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, 10562 + ... + 370328.

It is an arithmetic number, because the mean of its divisors is an integer number (5269701780).

Almost surely, 2^68515826315 is an apocalyptic number.

68515826315 is a deficient number, since it is larger than the sum of its proper divisors (15799402165).

68515826315 is a wasteful number, since it uses less digits than its factorization.

68515826315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360742.

The product of its digits is 1728000, while the sum is 50.

The spelling of 68515826315 in words is "sixty-eight billion, five hundred fifteen million, eight hundred twenty-six thousand, three hundred fifteen".