45545918191 has 8 divisors (see below), whose sum is σ = 48847659120. Its totient is φ = 42334636032.

The previous prime is 45545918149. The next prime is 45545918207. The reversal of 45545918191 is 19181954554.

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

It is a cyclic number.

It is not a de Polignac number, because 45545918191 - 2⁷ = 45545918063 is a prime.

It is a super-2 number, since 2×45545918191² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45545918591) 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, 22613650 + ... + 22615663.

It is an arithmetic number, because the mean of its divisors is an integer number (6105957390).

Almost surely, 2^45545918191 is an apocalyptic number.

45545918191 is a deficient number, since it is larger than the sum of its proper divisors (3301740929).

45545918191 is a wasteful number, since it uses less digits than its factorization.

45545918191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45229385.

The product of its digits is 1296000, while the sum is 52.

The spelling of 45545918191 in words is "forty-five billion, five hundred forty-five million, nine hundred eighteen thousand, one hundred ninety-one".