45849189391 has 4 divisors (see below), whose sum is σ = 47842632432. Its totient is φ = 43855746352.

The previous prime is 45849189377. The next prime is 45849189509. The reversal of 45849189391 is 19398194854.

45849189391 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, and also an emirpimes, since its reverse is a distinct semiprime: 19398194854 = 2 ⋅9699097427.

It is a cyclic number.

It is not a de Polignac number, because 45849189391 - 2¹³ = 45849181199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45849189691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996721486 + ... + 996721531.

It is an arithmetic number, because the mean of its divisors is an integer number (11960658108).

Almost surely, 2^45849189391 is an apocalyptic number.

45849189391 is a deficient number, since it is larger than the sum of its proper divisors (1993443041).

45849189391 is a wasteful number, since it uses less digits than its factorization.

45849189391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993443040.

The product of its digits is 11197440, while the sum is 61.

The spelling of 45849189391 in words is "forty-five billion, eight hundred forty-nine million, one hundred eighty-nine thousand, three hundred ninety-one".