617660989023 has 64 divisors (see below), whose sum is σ = 922807144448. Its totient is φ = 364913372160.

The previous prime is 617660988983. The next prime is 617660989031. The reversal of 617660989023 is 320989066716.

It is a happy number.

It is not a de Polignac number, because 617660989023 - 2²⁵ = 617627434591 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 (617660989123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120799515 + ... + 120804627.

It is an arithmetic number, because the mean of its divisors is an integer number (14418861632).

Almost surely, 2^617660989023 is an apocalyptic number.

617660989023 is a deficient number, since it is larger than the sum of its proper divisors (305146155425).

617660989023 is a wasteful number, since it uses less digits than its factorization.

617660989023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936.

The product of its (nonzero) digits is 5878656, while the sum is 57.

The spelling of 617660989023 in words is "six hundred seventeen billion, six hundred sixty million, nine hundred eighty-nine thousand, twenty-three".