19789628562 has 160 divisors (see below), whose sum is σ = 52300226880. Its totient is φ = 5527336320.

The previous prime is 19789628539. The next prime is 19789628563. The reversal of 19789628562 is 26582698791.

19789628562 is a `hidden beast` number, since 1 + 9 + 7 + 8 + 9 + 62 + 8 + 562 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 19789628562.

It is not an unprimeable number, because it can be changed into a prime (19789628563) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1244848 + ... + 1260644.

It is an arithmetic number, because the mean of its divisors is an integer number (326876418).

Almost surely, 2^19789628562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19789628562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26150113440).

19789628562 is an abundant number, since it is smaller than the sum of its proper divisors (32510598318).

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

19789628562 is a wasteful number, since it uses less digits than its factorization.

19789628562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15878 (or 15869 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 19789628562 in words is "nineteen billion, seven hundred eighty-nine million, six hundred twenty-eight thousand, five hundred sixty-two".