16549861986 has 48 divisors (see below), whose sum is σ = 41126537088. Its totient is φ = 4711694400.

The previous prime is 16549861961. The next prime is 16549861997. The reversal of 16549861986 is 68916894561.

16549861986 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 9 + 8 + 619 + 8 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 198310 + ... + 269121.

It is an arithmetic number, because the mean of its divisors is an integer number (856802856).

Almost surely, 2^16549861986 is an apocalyptic number.

16549861986 is an abundant number, since it is smaller than the sum of its proper divisors (24576675102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16549861986 is a wasteful number, since it uses less digits than its factorization.

16549861986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467727 (or 467724 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 16549861986 in words is "sixteen billion, five hundred forty-nine million, eight hundred sixty-one thousand, nine hundred eighty-six".