16777346857 has 2 divisors, whose sum is σ = 16777346858. Its totient is φ = 16777346856.

The previous prime is 16777346819. The next prime is 16777346863. The reversal of 16777346857 is 75864377761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15930478656 + 846868201 = 126216^2 + 29101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16777346857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16777346795 and 16777346804.

It is not a weakly prime, because it can be changed into another prime (16777346897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8388673428 + 8388673429.

It is an arithmetic number, because the mean of its divisors is an integer number (8388673429).

Almost surely, 2^16777346857 is an apocalyptic number.

It is an amenable number.

16777346857 is a deficient number, since it is larger than the sum of its proper divisors (1).

16777346857 is an equidigital number, since it uses as much as digits as its factorization.

16777346857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41489280, while the sum is 61.

The spelling of 16777346857 in words is "sixteen billion, seven hundred seventy-seven million, three hundred forty-six thousand, eight hundred fifty-seven".