16681793004 has 36 divisors (see below), whose sum is σ = 44001253296. Its totient is φ = 5318832288.

The previous prime is 16681792999. The next prime is 16681793021. The reversal of 16681793004 is 40039718661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10072719 + ... + 10074374.

It is an arithmetic number, because the mean of its divisors is an integer number (1222257036).

Almost surely, 2^16681793004 is an apocalyptic number.

It is an amenable number.

16681793004 is an abundant number, since it is smaller than the sum of its proper divisors (27319460292).

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

16681793004 is a wasteful number, since it uses less digits than its factorization.

16681793004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20147126 (or 20147121 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 16681793004 in words is "sixteen billion, six hundred eighty-one million, seven hundred ninety-three thousand, four".