16643442357456 has 40 divisors (see below), whose sum is σ = 43184967202464. Its totient is φ = 5523374405760.

The previous prime is 16643442357427. The next prime is 16643442357523. The reversal of 16643442357456 is 65475324434661.

It is a self number, because there is not a number n which added to its sum of digits gives 16643442357456.

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, 763730035 + ... + 763751826.

Almost surely, 2^{16643442357456} is an apocalyptic number.

16643442357456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16643442357456 is an abundant number, since it is smaller than the sum of its proper divisors (26541524845008).

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

16643442357456 is a wasteful number, since it uses less digits than its factorization.

16643442357456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527482099 (or 1527482093 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 60.

The spelling of 16643442357456 in words is "sixteen trillion, six hundred forty-three billion, four hundred forty-two million, three hundred fifty-seven thousand, four hundred fifty-six".