18476591616 has 320 divisors, whose sum is σ = 64043400960. Its totient is φ = 5149163520.

The previous prime is 18476591603. The next prime is 18476591641. The reversal of 18476591616 is 61619567481.

18476591616 is a `hidden beast` number, since 1 + 8 + 47 + 6 + 591 + 6 + 1 + 6 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3965160 + ... + 3969816.

It is an arithmetic number, because the mean of its divisors is an integer number (200135628).

Almost surely, 2^18476591616 is an apocalyptic number.

18476591616 is a gapful number since it is divisible by the number (16) 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 18476591616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32021700480).

18476591616 is an abundant number, since it is smaller than the sum of its proper divisors (45566809344).

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

18476591616 is an equidigital number, since it uses as much as digits as its factorization.

18476591616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732 (or 4710 counting only the distinct ones).

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

The spelling of 18476591616 in words is "eighteen billion, four hundred seventy-six million, five hundred ninety-one thousand, six hundred sixteen".