16645595487 has 16 divisors (see below), whose sum is σ = 23546204160. Its totient is φ = 10430223552.

The previous prime is 16645595471. The next prime is 16645595503. The reversal of 16645595487 is 78459554661.

It is an interprime number because it is at equal distance from previous prime (16645595471) and next prime (16645595503).

It is not a de Polignac number, because 16645595487 - 2⁴ = 16645595471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16645595487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645595587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1142478 + ... + 1156955.

It is an arithmetic number, because the mean of its divisors is an integer number (1471637760).

Almost surely, 2^16645595487 is an apocalyptic number.

16645595487 is a deficient number, since it is larger than the sum of its proper divisors (6900608673).

16645595487 is a wasteful number, since it uses less digits than its factorization.

16645595487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299582.

The product of its digits is 36288000, while the sum is 60.

The spelling of 16645595487 in words is "sixteen billion, six hundred forty-five million, five hundred ninety-five thousand, four hundred eighty-seven".