19641674545 has 8 divisors (see below), whose sum is σ = 23573160000. Its totient is φ = 15711239280.

The previous prime is 19641674539. The next prime is 19641674561. The reversal of 19641674545 is 54547614691.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19641674545 - 2³ = 19641674537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19641674492 and 19641674501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220795 + ... + 296704.

It is an arithmetic number, because the mean of its divisors is an integer number (2946645000).

Almost surely, 2^19641674545 is an apocalyptic number.

It is an amenable number.

19641674545 is a deficient number, since it is larger than the sum of its proper divisors (3931485455).

19641674545 is an equidigital number, since it uses as much as digits as its factorization.

19641674545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525095.

The product of its digits is 3628800, while the sum is 52.

The spelling of 19641674545 in words is "nineteen billion, six hundred forty-one million, six hundred seventy-four thousand, five hundred forty-five".