16640762543 has 4 divisors (see below), whose sum is σ = 17090512920. Its totient is φ = 16191012168.

The previous prime is 16640762483. The next prime is 16640762563. The reversal of 16640762543 is 34526704661.

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 16640762543 - 2⁸ = 16640762287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16640762494 and 16640762503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640762563) 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, 224875133 + ... + 224875206.

It is an arithmetic number, because the mean of its divisors is an integer number (4272628230).

Almost surely, 2^16640762543 is an apocalyptic number.

16640762543 is a deficient number, since it is larger than the sum of its proper divisors (449750377).

16640762543 is an equidigital number, since it uses as much as digits as its factorization.

16640762543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449750376.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 16640762543 in words is "sixteen billion, six hundred forty million, seven hundred sixty-two thousand, five hundred forty-three".