18387545621760 has 1728 divisors, whose sum is σ = 81145939230720. Its totient is φ = 3748723752960.

The previous prime is 18387545621737. The next prime is 18387545621813. The reversal of 18387545621760 is 6712654578381.

It is a happy number.

18387545621760 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 7 + 5 + 4 + 562 + 1 + 7 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1757382289 + ... + 1757392751.

Almost surely, 2^{18387545621760} is an apocalyptic number.

18387545621760 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 18387545621760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40572969615360).

18387545621760 is an abundant number, since it is smaller than the sum of its proper divisors (62758393608960).

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

18387545621760 is a wasteful number, since it uses less digits than its factorization.

18387545621760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10584 (or 10567 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 63.

The spelling of 18387545621760 in words is "eighteen trillion, three hundred eighty-seven billion, five hundred forty-five million, six hundred twenty-one thousand, seven hundred sixty".