68506529615 has 8 divisors (see below), whose sum is σ = 82211089968. Its totient is φ = 54803054080.

The previous prime is 68506529593. The next prime is 68506529657. The reversal of 68506529615 is 51692560586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68506529615 - 2⁸ = 68506529359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125117 + ... + 390726.

It is an arithmetic number, because the mean of its divisors is an integer number (10276386246).

Almost surely, 2^68506529615 is an apocalyptic number.

68506529615 is a deficient number, since it is larger than the sum of its proper divisors (13704560353).

68506529615 is a wasteful number, since it uses less digits than its factorization.

68506529615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542409.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The spelling of 68506529615 in words is "sixty-eight billion, five hundred six million, five hundred twenty-nine thousand, six hundred fifteen".