16499171577 has 32 divisors (see below), whose sum is σ = 25502033920. Its totient is φ = 9293097600.

The previous prime is 16499171539. The next prime is 16499171617. The reversal of 16499171577 is 77517199461.

It is not a de Polignac number, because 16499171577 - 2¹⁸ = 16498909433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16499171677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3908574 + ... + 3912792.

It is an arithmetic number, because the mean of its divisors is an integer number (796938560).

Almost surely, 2^16499171577 is an apocalyptic number.

It is an amenable number.

16499171577 is a deficient number, since it is larger than the sum of its proper divisors (9002862343).

16499171577 is a wasteful number, since it uses less digits than its factorization.

16499171577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6853.

The product of its digits is 3333960, while the sum is 57.

The spelling of 16499171577 in words is "sixteen billion, four hundred ninety-nine million, one hundred seventy-one thousand, five hundred seventy-seven".