68775815 has 8 divisors (see below), whose sum is σ = 82846368. Its totient is φ = 54810400.

The previous prime is 68775809. The next prime is 68775827. The reversal of 68775815 is 51857786.

It is a happy number.

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

It is not a de Polignac number, because 68775815 - 2¹⁰ = 68774791 is a prime.

It is a super-2 number, since 2×68775815² = 9460225457828450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68775815.

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, 24836 + ... + 27465.

It is an arithmetic number, because the mean of its divisors is an integer number (10355796).

Almost surely, 2^68775815 is an apocalyptic number.

68775815 is a deficient number, since it is larger than the sum of its proper divisors (14070553).

68775815 is a wasteful number, since it uses less digits than its factorization.

68775815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52569.

The product of its digits is 470400, while the sum is 47.

The square root of 68775815 is about 8293.1185328560. The cubic root of 68775815 is about 409.7119034987.

The spelling of 68775815 in words is "sixty-eight million, seven hundred seventy-five thousand, eight hundred fifteen".