617720430894 has 48 divisors (see below), whose sum is σ = 1512784742400. Its totient is φ = 167202521136.

The previous prime is 617720430881. The next prime is 617720430941. The reversal of 617720430894 is 498034027716.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55286254 + ... + 55297425.

It is an arithmetic number, because the mean of its divisors is an integer number (31516348800).

Almost surely, 2^617720430894 is an apocalyptic number.

617720430894 is an abundant number, since it is smaller than the sum of its proper divisors (895064311506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

617720430894 is a wasteful number, since it uses less digits than its factorization.

617720430894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110583717 (or 110583710 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 617720430894 in words is "six hundred seventeen billion, seven hundred twenty million, four hundred thirty thousand, eight hundred ninety-four".