68170156615 has 16 divisors (see below), whose sum is σ = 89268220800. Its totient is φ = 49563135520.

The previous prime is 68170156589. The next prime is 68170156633. The reversal of 68170156615 is 51665107186.

It is a de Polignac number, because none of the positive numbers 2^k-68170156615 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6409 + ... + 369298.

It is an arithmetic number, because the mean of its divisors is an integer number (5579263800).

Almost surely, 2^68170156615 is an apocalyptic number.

68170156615 is a deficient number, since it is larger than the sum of its proper divisors (21098064185).

68170156615 is a wasteful number, since it uses less digits than its factorization.

68170156615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379022.

The product of its (nonzero) digits is 302400, while the sum is 46.

It can be divided in two parts, 68170 and 156615, that added together give a triangular number (224785 = T₆₇₀).

The spelling of 68170156615 in words is "sixty-eight billion, one hundred seventy million, one hundred fifty-six thousand, six hundred fifteen".