18649792512 has 600 divisors, whose sum is σ = 63944407296. Its totient is φ = 5372116992.

The previous prime is 18649792507. The next prime is 18649792619. The reversal of 18649792512 is 21529794681.

It is a happy number.

18649792512 is a `hidden beast` number, since 1 + 86 + 49 + 7 + 9 + 2 + 512 = 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 39 ways as a sum of consecutive naturals, for example, 396804073 + ... + 396804119.

Almost surely, 2^18649792512 is an apocalyptic number.

18649792512 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 18649792512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31972203648).

18649792512 is an abundant number, since it is smaller than the sum of its proper divisors (45294614784).

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

18649792512 is an equidigital number, since it uses as much as digits as its factorization.

18649792512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 88 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 18649792512 in words is "eighteen billion, six hundred forty-nine million, seven hundred ninety-two thousand, five hundred twelve".