19556934849 has 24 divisors (see below), whose sum is σ = 28784527200. Its totient is φ = 12792985920.

The previous prime is 19556934779. The next prime is 19556934853. The reversal of 19556934849 is 94843965591.

19556934849 is a `hidden beast` number, since 1 + 9 + 556 + 9 + 34 + 8 + 49 = 666.

It is not a de Polignac number, because 19556934849 - 2⁷ = 19556934721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19556934899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11742 + ... + 198120.

It is an arithmetic number, because the mean of its divisors is an integer number (1199355300).

Almost surely, 2^19556934849 is an apocalyptic number.

It is an amenable number.

19556934849 is a deficient number, since it is larger than the sum of its proper divisors (9227592351).

19556934849 is a wasteful number, since it uses less digits than its factorization.

19556934849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186605 (or 186602 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 63.

The spelling of 19556934849 in words is "nineteen billion, five hundred fifty-six million, nine hundred thirty-four thousand, eight hundred forty-nine".