19455055491 has 8 divisors (see below), whose sum is σ = 27305341120. Its totient is φ = 12287403432.

The previous prime is 19455055489. The next prime is 19455055523.

19455055491 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 19455055491 - 2¹ = 19455055489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19455055491.

It is not an unprimeable number, because it can be changed into a prime (19455055441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170658325 + ... + 170658438.

It is an arithmetic number, because the mean of its divisors is an integer number (3413167640).

Almost surely, 2^19455055491 is an apocalyptic number.

19455055491 is a deficient number, since it is larger than the sum of its proper divisors (7850285629).

19455055491 is a wasteful number, since it uses less digits than its factorization.

19455055491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341316785.

The product of its (nonzero) digits is 810000, while the sum is 48.

Subtracting from 19455055491 its product of nonzero digits (810000), we obtain a palindrome (19454245491).

The spelling of 19455055491 in words is "nineteen billion, four hundred fifty-five million, fifty-five thousand, four hundred ninety-one".