15455554891 has 4 divisors (see below), whose sum is σ = 17663491312. Its totient is φ = 13247618472.

The previous prime is 15455554867. The next prime is 15455554903. The reversal of 15455554891 is 19845555451.

15455554891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15455554891 - 2⁵ = 15455554859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15455554861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103968200 + ... + 1103968213.

It is an arithmetic number, because the mean of its divisors is an integer number (4415872828).

Almost surely, 2^15455554891 is an apocalyptic number.

15455554891 is a deficient number, since it is larger than the sum of its proper divisors (2207936421).

15455554891 is an equidigital number, since it uses as much as digits as its factorization.

15455554891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207936420.

The product of its digits is 3600000, while the sum is 52.

The spelling of 15455554891 in words is "fifteen billion, four hundred fifty-five million, five hundred fifty-four thousand, eight hundred ninety-one".