18136546560 has 432 divisors, whose sum is σ = 72490541760. Its totient is φ = 4137615360.

The previous prime is 18136546499. The next prime is 18136546573. The reversal of 18136546560 is 6564563181.

18136546560 is a `hidden beast` number, since 1 + 8 + 1 + 36 + 54 + 6 + 560 = 666.

It is a super-2 number, since 2×18136546560² (a number of 21 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 2150031 + ... + 2158449.

It is an arithmetic number, because the mean of its divisors is an integer number (167802180).

Almost surely, 2^18136546560 is an apocalyptic number.

18136546560 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 18136546560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36245270880).

18136546560 is an abundant number, since it is smaller than the sum of its proper divisors (54353995200).

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

18136546560 is a wasteful number, since it uses less digits than its factorization.

18136546560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8474 (or 8457 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 18136546560 in words is "eighteen billion, one hundred thirty-six million, five hundred forty-six thousand, five hundred sixty".