18156070944 has 480 divisors, whose sum is σ = 60857153280. Its totient is φ = 5261760000.

The previous prime is 18156070943. The next prime is 18156070949. The reversal of 18156070944 is 44907065181.

18156070944 is a `hidden beast` number, since 1 + 81 + 560 + 7 + 0 + 9 + 4 + 4 = 666.

It is a super-2 number, since 2×18156070944² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18156070944.

It is not an unprimeable number, because it can be changed into a prime (18156070943) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 72334819 + ... + 72335069.

It is an arithmetic number, because the mean of its divisors is an integer number (126785736).

Almost surely, 2^18156070944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18156070944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30428576640).

18156070944 is an abundant number, since it is smaller than the sum of its proper divisors (42701082336).

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

18156070944 is a wasteful number, since it uses less digits than its factorization.

18156070944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 369 counting only the distinct ones).

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

The spelling of 18156070944 in words is "eighteen billion, one hundred fifty-six million, seventy thousand, nine hundred forty-four".