68815065 has 32 divisors (see below), whose sum is σ = 127184256. Its totient is φ = 31400960.

The previous prime is 68815049. The next prime is 68815073. The reversal of 68815065 is 56051886.

It is not a de Polignac number, because 68815065 - 2⁴ = 68815049 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9462 + ... + 15071.

It is an arithmetic number, because the mean of its divisors is an integer number (3974508).

Almost surely, 2^68815065 is an apocalyptic number.

It is an amenable number.

68815065 is a deficient number, since it is larger than the sum of its proper divisors (58369191).

68815065 is a wasteful number, since it uses less digits than its factorization.

68815065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24569.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 68815065 is about 8295.4846151385. The cubic root of 68815065 is about 409.7898288277.

It can be divided in two parts, 688 and 15065, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 68815065 in words is "sixty-eight million, eight hundred fifteen thousand, sixty-five".