16771657513 has 18 divisors (see below), whose sum is σ = 19292218314. Its totient is φ = 14570809344.

The previous prime is 16771657501. The next prime is 16771657537. The reversal of 16771657513 is 31575617761.

It can be written as a sum of positive squares in 9 ways, for example, as 1977314089 + 14794343424 = 44467^2 + 121632^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16771657513 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16771657583) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 122856 + ... + 220537.

Almost surely, 2^16771657513 is an apocalyptic number.

16771657513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16771657513 is a deficient number, since it is larger than the sum of its proper divisors (2520560801).

16771657513 is a wasteful number, since it uses less digits than its factorization.

16771657513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343453 (or 343423 counting only the distinct ones).

The product of its digits is 926100, while the sum is 49.

The spelling of 16771657513 in words is "sixteen billion, seven hundred seventy-one million, six hundred fifty-seven thousand, five hundred thirteen".