19556500008 has 16 divisors (see below), whose sum is σ = 48891250080. Its totient is φ = 6518833328.

The previous prime is 19556499997. The next prime is 19556500027. The reversal of 19556500008 is 80000565591.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407427060 + ... + 407427107.

It is an arithmetic number, because the mean of its divisors is an integer number (3055703130).

Almost surely, 2^19556500008 is an apocalyptic number.

It is an amenable number.

19556500008 is an abundant number, since it is smaller than the sum of its proper divisors (29334750072).

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

19556500008 is a wasteful number, since it uses less digits than its factorization.

19556500008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814854176 (or 814854172 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 19556500008 in words is "nineteen billion, five hundred fifty-six million, five hundred thousand, eight".