609557539888 has 80 divisors (see below), whose sum is σ = 1331988175872. Its totient is φ = 267721632000.

The previous prime is 609557539783. The next prime is 609557539889. The reversal of 609557539888 is 888935755906.

It is a super-2 number, since 2×609557539888² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 609557539888.

It is not an unprimeable number, because it can be changed into a prime (609557539889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3477223 + ... + 3648313.

Almost surely, 2^609557539888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609557539888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665994087936).

609557539888 is an abundant number, since it is smaller than the sum of its proper divisors (722430635984).

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

609557539888 is a wasteful number, since it uses less digits than its factorization.

609557539888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171794 (or 171788 counting only the distinct ones).

The product of its (nonzero) digits is 653184000, while the sum is 73.

The spelling of 609557539888 in words is "six hundred nine billion, five hundred fifty-seven million, five hundred thirty-nine thousand, eight hundred eighty-eight".