16564746541 has 8 divisors (see below), whose sum is σ = 19213693760. Its totient is φ = 13986438048.

The previous prime is 16564746469. The next prime is 16564746547. The reversal of 16564746541 is 14564746561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16564746541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564746547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17659176 + ... + 17660113.

It is an arithmetic number, because the mean of its divisors is an integer number (2401711720).

Almost surely, 2^16564746541 is an apocalyptic number.

It is an amenable number.

16564746541 is a deficient number, since it is larger than the sum of its proper divisors (2648947219).

16564746541 is an equidigital number, since it uses as much as digits as its factorization.

16564746541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35319363.

The product of its digits is 2419200, while the sum is 49.

The spelling of 16564746541 in words is "sixteen billion, five hundred sixty-four million, seven hundred forty-six thousand, five hundred forty-one".