16461611066643 has 4 divisors (see below), whose sum is σ = 21948814755528. Its totient is φ = 10974407377760.

The previous prime is 16461611066623. The next prime is 16461611066657. The reversal of 16461611066643 is 34666011616461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16461611066643 - 2⁵ = 16461611066611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16461611066623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743601844438 + ... + 2743601844443.

It is an arithmetic number, because the mean of its divisors is an integer number (5487203688882).

Almost surely, 2^{16461611066643} is an apocalyptic number.

16461611066643 is a deficient number, since it is larger than the sum of its proper divisors (5487203688885).

16461611066643 is an equidigital number, since it uses as much as digits as its factorization.

16461611066643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487203688884.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 16461611066643 in words is "sixteen trillion, four hundred sixty-one billion, six hundred eleven million, sixty-six thousand, six hundred forty-three".