16745922987 has 4 divisors (see below), whose sum is σ = 22327897320. Its totient is φ = 11163948656.

The previous prime is 16745922943. The next prime is 16745923001. The reversal of 16745922987 is 78922954761.

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 16745922987 - 2⁶ = 16745922923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16745922987.

It is not an unprimeable number, because it can be changed into a prime (16745922887) 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, 2790987162 + ... + 2790987167.

It is an arithmetic number, because the mean of its divisors is an integer number (5581974330).

Almost surely, 2^16745922987 is an apocalyptic number.

16745922987 is a deficient number, since it is larger than the sum of its proper divisors (5581974333).

16745922987 is an equidigital number, since it uses as much as digits as its factorization.

16745922987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581974332.

The product of its digits is 15240960, while the sum is 60.

The spelling of 16745922987 in words is "sixteen billion, seven hundred forty-five million, nine hundred twenty-two thousand, nine hundred eighty-seven".