18078852464640 has 2400 divisors, whose sum is σ = 75226027726080. Its totient is φ = 4145094328320.

The previous prime is 18078852464639. The next prime is 18078852464657. The reversal of 18078852464640 is 4646425887081.

It is a happy number.

18078852464640 is a `hidden beast` number, since 1 + 8 + 0 + 7 + 8 + 8 + 524 + 64 + 6 + 40 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 203133173716 + ... + 203133173804.

Almost surely, 2^{18078852464640} is an apocalyptic number.

18078852464640 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 18078852464640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37613013863040).

18078852464640 is an abundant number, since it is smaller than the sum of its proper divisors (57147175261440).

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

18078852464640 is an frugal number, since it uses more digits than its factorization.

18078852464640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 82575360, while the sum is 63.

The spelling of 18078852464640 in words is "eighteen trillion, seventy-eight billion, eight hundred fifty-two million, four hundred sixty-four thousand, six hundred forty".