16691604442432 has 56 divisors (see below), whose sum is σ = 33666453769320. Its totient is φ = 8208727080960.

The previous prime is 16691604442379. The next prime is 16691604442441. The reversal of 16691604442432 is 23424440619661.

It can be written as a sum of positive squares in 4 ways, for example, as 890788641856 + 15800815800576 = 943816^2 + 3975024^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16691604442432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199597044 + ... + 199680652.

Almost surely, 2^{16691604442432} is an apocalyptic number.

It is an amenable number.

16691604442432 is an abundant number, since it is smaller than the sum of its proper divisors (16974849326888).

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

16691604442432 is an equidigital number, since it uses as much as digits as its factorization.

16691604442432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134819 (or 134809 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 52.

The spelling of 16691604442432 in words is "sixteen trillion, six hundred ninety-one billion, six hundred four million, four hundred forty-two thousand, four hundred thirty-two".