16931553687 has 20 divisors (see below), whose sum is σ = 25453934616. Its totient is φ = 11215797840.

The previous prime is 16931553679. The next prime is 16931553701. The reversal of 16931553687 is 78635513961.

16931553687 is a `hidden beast` number, since 1 + 6 + 9 + 3 + 1 + 553 + 6 + 87 = 666.

16931553687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16931553687 - 2³ = 16931553679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16931553887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 652989 + ... + 678422.

Almost surely, 2^16931553687 is an apocalyptic number.

16931553687 is a deficient number, since it is larger than the sum of its proper divisors (8522380929).

16931553687 is a wasteful number, since it uses less digits than its factorization.

16931553687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331580 (or 1331571 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 16931553687 in words is "sixteen billion, nine hundred thirty-one million, five hundred fifty-three thousand, six hundred eighty-seven".