617720430945 has 8 divisors (see below), whose sum is σ = 988352689536. Its totient is φ = 329450896496.

The previous prime is 617720430941. The next prime is 617720430949. The reversal of 617720430945 is 549034027716.

It is an interprime number because it is at equal distance from previous prime (617720430941) and next prime (617720430949).

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 617720430945 - 2² = 617720430941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617720430894 and 617720430903.

It is not an unprimeable number, because it can be changed into a prime (617720430941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20590681017 + ... + 20590681046.

It is an arithmetic number, because the mean of its divisors is an integer number (123544086192).

Almost surely, 2^617720430945 is an apocalyptic number.

It is an amenable number.

617720430945 is a deficient number, since it is larger than the sum of its proper divisors (370632258591).

617720430945 is a wasteful number, since it uses less digits than its factorization.

617720430945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41181362071.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 617720430945 in words is "six hundred seventeen billion, seven hundred twenty million, four hundred thirty thousand, nine hundred forty-five".