18611664396 has 192 divisors, whose sum is σ = 52306974720. Its totient is φ = 5088337920.

The previous prime is 18611664389. The next prime is 18611664419. The reversal of 18611664396 is 69346611681.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21716800 + ... + 21717656.

It is an arithmetic number, because the mean of its divisors is an integer number (272432160).

Almost surely, 2^18611664396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18611664396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26153487360).

18611664396 is an abundant number, since it is smaller than the sum of its proper divisors (33695310324).

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

18611664396 is a wasteful number, since it uses less digits than its factorization.

18611664396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The spelling of 18611664396 in words is "eighteen billion, six hundred eleven million, six hundred sixty-four thousand, three hundred ninety-six".