18149812061 has 8 divisors (see below), whose sum is σ = 18248651904. Its totient is φ = 18051022080.

The previous prime is 18149811947. The next prime is 18149812091. The reversal of 18149812061 is 16021894181.

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 18149812061 - 2²² = 18145617757 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 (18149812091) 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 7 ways as a sum of consecutive naturals, for example, 895340 + ... + 915386.

It is an arithmetic number, because the mean of its divisors is an integer number (2281081488).

Almost surely, 2^18149812061 is an apocalyptic number.

It is an amenable number.

18149812061 is a deficient number, since it is larger than the sum of its proper divisors (98839843).

18149812061 is a wasteful number, since it uses less digits than its factorization.

18149812061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24931.

The product of its (nonzero) digits is 27648, while the sum is 41.

The spelling of 18149812061 in words is "eighteen billion, one hundred forty-nine million, eight hundred twelve thousand, sixty-one".