68611795997 has 8 divisors (see below), whose sum is σ = 68784204216. Its totient is φ = 68439485952.

The previous prime is 68611795979. The next prime is 68611796027. The reversal of 68611795997 is 79959711686.

It can be written as a sum of positive squares in 4 ways, for example, as 34332754681 + 34279041316 = 185291^2 + 185146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68611795997 - 2⁸ = 68611795741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68611795297) 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, 1491383 + ... + 1536699.

It is an arithmetic number, because the mean of its divisors is an integer number (8598025527).

Almost surely, 2^68611795997 is an apocalyptic number.

It is an amenable number.

68611795997 is a deficient number, since it is larger than the sum of its proper divisors (172408219).

68611795997 is a wasteful number, since it uses less digits than its factorization.

68611795997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49087.

The product of its digits is 51438240, while the sum is 68.

The spelling of 68611795997 in words is "sixty-eight billion, six hundred eleven million, seven hundred ninety-five thousand, nine hundred ninety-seven".