17977986863 has 12 divisors (see below), whose sum is σ = 19196734560. Its totient is φ = 16832735232.

The previous prime is 17977986857. The next prime is 17977986919. The reversal of 17977986863 is 36868977971.

It is not a de Polignac number, because 17977986863 - 2¹⁶ = 17977921327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17977986853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105383 + ... + 216936.

It is an arithmetic number, because the mean of its divisors is an integer number (1599727880).

Almost surely, 2^17977986863 is an apocalyptic number.

17977986863 is a deficient number, since it is larger than the sum of its proper divisors (1218747697).

17977986863 is a wasteful number, since it uses less digits than its factorization.

17977986863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322546 (or 322529 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 71.

The spelling of 17977986863 in words is "seventeen billion, nine hundred seventy-seven million, nine hundred eighty-six thousand, eight hundred sixty-three".