18523560166272 has 768 divisors, whose sum is σ = 65797884518400. Its totient is φ = 5109989068800.

The previous prime is 18523560166259. The next prime is 18523560166417. The reversal of 18523560166272 is 27266106532581.

18523560166272 is a `hidden beast` number, since 1 + 8 + 5 + 2 + 3 + 5 + 6 + 0 + 1 + 6 + 627 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 2430590622 + ... + 2430598242.

It is an arithmetic number, because the mean of its divisors is an integer number (85674328800).

Almost surely, 2^{18523560166272} is an apocalyptic number.

18523560166272 is a gapful number since it is divisible by the number (12) 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 18523560166272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32898942259200).

18523560166272 is an abundant number, since it is smaller than the sum of its proper divisors (47274324352128).

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

18523560166272 is a wasteful number, since it uses less digits than its factorization.

18523560166272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152 (or 8127 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 18523560166272 in words is "eighteen trillion, five hundred twenty-three billion, five hundred sixty million, one hundred sixty-six thousand, two hundred seventy-two".