68170920998 has 4 divisors (see below), whose sum is σ = 102256381500. Its totient is φ = 34085460498.

The previous prime is 68170920997. The next prime is 68170921019. The reversal of 68170920998 is 89902907186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68170920991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17042730248 + ... + 17042730251.

It is an arithmetic number, because the mean of its divisors is an integer number (25564095375).

Almost surely, 2^68170920998 is an apocalyptic number.

68170920998 is a deficient number, since it is larger than the sum of its proper divisors (34085460502).

68170920998 is a wasteful number, since it uses less digits than its factorization.

68170920998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34085460501.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 68170920998 in words is "sixty-eight billion, one hundred seventy million, nine hundred twenty thousand, nine hundred ninety-eight".