617668740979 has 8 divisors (see below), whose sum is σ = 625001045760. Its totient is φ = 610362119496.

The previous prime is 617668740961. The next prime is 617668741057. The reversal of 617668740979 is 979047866716.

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 617668740979 - 2⁵ = 617668740947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617668740679) 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, 6372439 + ... + 6468640.

It is an arithmetic number, because the mean of its divisors is an integer number (78125130720).

Almost surely, 2^617668740979 is an apocalyptic number.

617668740979 is a deficient number, since it is larger than the sum of its proper divisors (7332304781).

617668740979 is a wasteful number, since it uses less digits than its factorization.

617668740979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12841649.

The product of its (nonzero) digits is 192036096, while the sum is 70.

The spelling of 617668740979 in words is "six hundred seventeen billion, six hundred sixty-eight million, seven hundred forty thousand, nine hundred seventy-nine".