16849892557 has 2 divisors, whose sum is σ = 16849892558. Its totient is φ = 16849892556.

The previous prime is 16849892539. The next prime is 16849892597. The reversal of 16849892557 is 75529894861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8431096041 + 8418796516 = 91821^2 + 91754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16849892557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16849892597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8424946278 + 8424946279.

It is an arithmetic number, because the mean of its divisors is an integer number (8424946279).

Almost surely, 2^16849892557 is an apocalyptic number.

It is an amenable number.

16849892557 is a deficient number, since it is larger than the sum of its proper divisors (1).

16849892557 is an equidigital number, since it uses as much as digits as its factorization.

16849892557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43545600, while the sum is 64.

The spelling of 16849892557 in words is "sixteen billion, eight hundred forty-nine million, eight hundred ninety-two thousand, five hundred fifty-seven".