68387059918 has 4 divisors (see below), whose sum is σ = 102580589880. Its totient is φ = 34193529958.

The previous prime is 68387059901. The next prime is 68387059931. The reversal of 68387059918 is 81995078386.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68387059918.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17096764978 + ... + 17096764981.

It is an arithmetic number, because the mean of its divisors is an integer number (25645147470).

Almost surely, 2^68387059918 is an apocalyptic number.

68387059918 is a deficient number, since it is larger than the sum of its proper divisors (34193529962).

68387059918 is a wasteful number, since it uses less digits than its factorization.

68387059918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34193529961.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 68387059918 in words is "sixty-eight billion, three hundred eighty-seven million, fifty-nine thousand, nine hundred eighteen".