68118537 has 4 divisors (see below), whose sum is σ = 90824720. Its totient is φ = 45412356.

The previous prime is 68118527. The next prime is 68118539. The reversal of 68118537 is 73581186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68118537 - 2⁴ = 68118521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68118495 and 68118504.

It is not an unprimeable number, because it can be changed into a prime (68118539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11353087 + ... + 11353092.

It is an arithmetic number, because the mean of its divisors is an integer number (22706180).

Almost surely, 2^68118537 is an apocalyptic number.

It is an amenable number.

68118537 is a deficient number, since it is larger than the sum of its proper divisors (22706183).

68118537 is a wasteful number, since it uses less digits than its factorization.

68118537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22706182.

The product of its digits is 40320, while the sum is 39.

The square root of 68118537 is about 8253.3954830724. The cubic root of 68118537 is about 408.4025426860.

The spelling of 68118537 in words is "sixty-eight million, one hundred eighteen thousand, five hundred thirty-seven".