16661143562 has 24 divisors (see below), whose sum is σ = 29293941600. Its totient is φ = 7085977080.

The previous prime is 16661143523. The next prime is 16661143591. The reversal of 16661143562 is 26534116661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 636062 + ... + 661737.

It is an arithmetic number, because the mean of its divisors is an integer number (1220580900).

Almost surely, 2^16661143562 is an apocalyptic number.

16661143562 is a deficient number, since it is larger than the sum of its proper divisors (12632798038).

16661143562 is a wasteful number, since it uses less digits than its factorization.

16661143562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297946 (or 1297939 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The spelling of 16661143562 in words is "sixteen billion, six hundred sixty-one million, one hundred forty-three thousand, five hundred sixty-two".