68218517958 has 16 divisors (see below), whose sum is σ = 138306037296. Its totient is φ = 22428005760.

The previous prime is 68218517951. The next prime is 68218518007. The reversal of 68218517958 is 85971581286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68218517951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77874583 + ... + 77875458.

It is an arithmetic number, because the mean of its divisors is an integer number (8644127331).

Almost surely, 2^68218517958 is an apocalyptic number.

68218517958 is an abundant number, since it is smaller than the sum of its proper divisors (70087519338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68218517958 is a wasteful number, since it uses less digits than its factorization.

68218517958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155750119.

The product of its digits is 9676800, while the sum is 60.

The spelling of 68218517958 in words is "sixty-eight billion, two hundred eighteen million, five hundred seventeen thousand, nine hundred fifty-eight".