16643701674 has 24 divisors (see below), whose sum is σ = 36161817120. Its totient is φ = 5532444648.

The previous prime is 16643701661. The next prime is 16643701691. The reversal of 16643701674 is 47610734661.

16643701674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16643701674² (a number of 21 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 1281352 + ... + 1294275.

It is an arithmetic number, because the mean of its divisors is an integer number (1506742380).

Almost surely, 2^16643701674 is an apocalyptic number.

16643701674 is an abundant number, since it is smaller than the sum of its proper divisors (19518115446).

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

16643701674 is a wasteful number, since it uses less digits than its factorization.

16643701674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575994 (or 2575991 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 16643701674 in words is "sixteen billion, six hundred forty-three million, seven hundred one thousand, six hundred seventy-four".