16620461383680 has 4480 divisors, whose sum is σ = 81389611607040. Its totient is φ = 3139184885760.

The previous prime is 16620461383651. The next prime is 16620461383753. The reversal of 16620461383680 is 8638316402661.

16620461383680 is a `hidden beast` number, since 1 + 6 + 6 + 20 + 461 + 3 + 83 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (4480).

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 319 ways as a sum of consecutive naturals, for example, 186746757076 + ... + 186746757164.

Almost surely, 2^{16620461383680} is an apocalyptic number.

16620461383680 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 16620461383680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40694805803520).

16620461383680 is an abundant number, since it is smaller than the sum of its proper divisors (64769150223360).

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

16620461383680 is a wasteful number, since it uses less digits than its factorization.

16620461383680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 16620461383680 in words is "sixteen trillion, six hundred twenty billion, four hundred sixty-one million, three hundred eighty-three thousand, six hundred eighty".