18160957440 has 144 divisors (see below), whose sum is σ = 62942934600. Its totient is φ = 4842897408.

The previous prime is 18160957411. The next prime is 18160957459. The reversal of 18160957440 is 4475906181.

18160957440 is a `hidden beast` number, since 18 + 1 + 60 + 9 + 574 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6370 + ... + 190689.

Almost surely, 2^18160957440 is an apocalyptic number.

18160957440 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 18160957440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31471467300).

18160957440 is an abundant number, since it is smaller than the sum of its proper divisors (44781977160).

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

18160957440 is a wasteful number, since it uses less digits than its factorization.

18160957440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197092 (or 197069 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 18160957440 in words is "eighteen billion, one hundred sixty million, nine hundred fifty-seven thousand, four hundred forty".