16549699986 has 48 divisors (see below), whose sum is σ = 36684835200. Its totient is φ = 5390689920.

The previous prime is 16549699981. The next prime is 16549700003. The reversal of 16549699986 is 68999694561.

16549699986 is a `hidden beast` number, since 16 + 549 + 69 + 9 + 9 + 8 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (16549699981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87115 + ... + 201713.

It is an arithmetic number, because the mean of its divisors is an integer number (764267400).

Almost surely, 2^16549699986 is an apocalyptic number.

16549699986 is an abundant number, since it is smaller than the sum of its proper divisors (20135135214).

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

16549699986 is a wasteful number, since it uses less digits than its factorization.

16549699986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114791 (or 114788 counting only the distinct ones).

The product of its digits is 226748160, while the sum is 72.

The spelling of 16549699986 in words is "sixteen billion, five hundred forty-nine million, six hundred ninety-nine thousand, nine hundred eighty-six".