18149041681 has 8 divisors (see below), whose sum is σ = 18537894144. Its totient is φ = 17760301920.

The previous prime is 18149041633. The next prime is 18149041711. The reversal of 18149041681 is 18614094181.

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 18149041681 - 2¹¹ = 18149039633 is a prime.

It is a super-2 number, since 2×18149041681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18149041601) 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, 351516 + ... + 399826.

It is an arithmetic number, because the mean of its divisors is an integer number (2317236768).

Almost surely, 2^18149041681 is an apocalyptic number.

It is an amenable number.

18149041681 is a deficient number, since it is larger than the sum of its proper divisors (388852463).

18149041681 is an equidigital number, since it uses as much as digits as its factorization.

18149041681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56351.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 18149041681 in words is "eighteen billion, one hundred forty-nine million, forty-one thousand, six hundred eighty-one".