16777346749 has 2 divisors, whose sum is σ = 16777346750. Its totient is φ = 16777346748.

The previous prime is 16777346701. The next prime is 16777346783. The reversal of 16777346749 is 94764377761.

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., 15377240025 + 1400106724 = 124005^2 + 37418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16777346749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16777346149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8388673374 + 8388673375.

It is an arithmetic number, because the mean of its divisors is an integer number (8388673375).

Almost surely, 2^16777346749 is an apocalyptic number.

It is an amenable number.

16777346749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16777346749 is an equidigital number, since it uses as much as digits as its factorization.

16777346749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37340352, while the sum is 61.

The spelling of 16777346749 in words is "sixteen billion, seven hundred seventy-seven million, three hundred forty-six thousand, seven hundred forty-nine".