68815995 has 16 divisors (see below), whose sum is σ = 112184352. Its totient is φ = 36008960.

The previous prime is 68815979. The next prime is 68815997. The reversal of 68815995 is 59951886.

It is not a de Polignac number, because 68815995 - 2⁴ = 68815979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68815997) 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, 42486 + ... + 44075.

It is an arithmetic number, because the mean of its divisors is an integer number (7011522).

Almost surely, 2^68815995 is an apocalyptic number.

68815995 is a deficient number, since it is larger than the sum of its proper divisors (43368357).

68815995 is a wasteful number, since it uses less digits than its factorization.

68815995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86622.

The product of its digits is 777600, while the sum is 51.

The square root of 68815995 is about 8295.5406695405. The cubic root of 68815995 is about 409.7916748519.

The spelling of 68815995 in words is "sixty-eight million, eight hundred fifteen thousand, nine hundred ninety-five".