16487790845 has 4 divisors (see below), whose sum is σ = 19785349020. Its totient is φ = 13190232672.

The previous prime is 16487790841. The next prime is 16487790857. The reversal of 16487790845 is 54809778461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54809778461 = 6073 ⋅9025157.

It can be written as a sum of positive squares in 2 ways, for example, as 10463857849 + 6023932996 = 102293^2 + 77614^2 .

It is a cyclic number.

It is not a de Polignac number, because 16487790845 - 2² = 16487790841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16487790841) 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, 1648779080 + ... + 1648779089.

It is an arithmetic number, because the mean of its divisors is an integer number (4946337255).

Almost surely, 2^16487790845 is an apocalyptic number.

It is an amenable number.

16487790845 is a deficient number, since it is larger than the sum of its proper divisors (3297558175).

16487790845 is an equidigital number, since it uses as much as digits as its factorization.

16487790845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297558174.

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 16487790845 in words is "sixteen billion, four hundred eighty-seven million, seven hundred ninety thousand, eight hundred forty-five".