16501680722376 has 128 divisors (see below), whose sum is σ = 48255376320000. Its totient is φ = 5210533500480.

The previous prime is 16501680722347. The next prime is 16501680722381. The reversal of 16501680722376 is 67322708610561.

16501680722376 is a `hidden beast` number, since 1 + 6 + 501 + 6 + 80 + 7 + 22 + 37 + 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41709055 + ... + 42102833.

It is an arithmetic number, because the mean of its divisors is an integer number (376995127500).

Almost surely, 2^{16501680722376} 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 16501680722376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24127688160000).

16501680722376 is an abundant number, since it is smaller than the sum of its proper divisors (31753695597624).

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

16501680722376 is a wasteful number, since it uses less digits than its factorization.

16501680722376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404024 (or 404014 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 16501680722376 in words is "sixteen trillion, five hundred one billion, six hundred eighty million, seven hundred twenty-two thousand, three hundred seventy-six".