18159671040 has 864 divisors, whose sum is σ = 74043164160. Its totient is φ = 3702620160.

The previous prime is 18159671039. The next prime is 18159671069. The reversal of 18159671040 is 4017695181.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18159670983 and 18159671001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 490801902 + ... + 490801938.

Almost surely, 2^18159671040 is an apocalyptic number.

18159671040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18159671040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37021582080).

18159671040 is an abundant number, since it is smaller than the sum of its proper divisors (55883493120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18159671040 is a wasteful number, since it uses less digits than its factorization.

18159671040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 18159671040 in words is "eighteen billion, one hundred fifty-nine million, six hundred seventy-one thousand, forty".