18199541457 has 40 divisors (see below), whose sum is σ = 28871393760. Its totient is φ = 11392617600.

The previous prime is 18199541441. The next prime is 18199541491. The reversal of 18199541457 is 75414599181.

18199541457 is a `hidden beast` number, since 1 + 8 + 1 + 99 + 541 + 4 + 5 + 7 = 666.

It is not a de Polignac number, because 18199541457 - 2⁴ = 18199541441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18199541417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 121582 + ... + 226232.

It is an arithmetic number, because the mean of its divisors is an integer number (721784844).

Almost surely, 2^18199541457 is an apocalyptic number.

It is an amenable number.

18199541457 is a deficient number, since it is larger than the sum of its proper divisors (10671852303).

18199541457 is a wasteful number, since it uses less digits than its factorization.

18199541457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104795 (or 104786 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The spelling of 18199541457 in words is "eighteen billion, one hundred ninety-nine million, five hundred forty-one thousand, four hundred fifty-seven".