16773144257 has 2 divisors, whose sum is σ = 16773144258. Its totient is φ = 16773144256.

The previous prime is 16773144253. The next prime is 16773144281. The reversal of 16773144257 is 75244137761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12317448256 + 4455696001 = 110984^2 + 66751^2 .

It is a cyclic number.

It is not a de Polignac number, because 16773144257 - 2² = 16773144253 is a prime.

It is a super-2 number, since 2×16773144257² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16773144253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8386572128 + 8386572129.

It is an arithmetic number, because the mean of its divisors is an integer number (8386572129).

Almost surely, 2^16773144257 is an apocalyptic number.

It is an amenable number.

16773144257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16773144257 is an equidigital number, since it uses as much as digits as its factorization.

16773144257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 47.

The spelling of 16773144257 in words is "sixteen billion, seven hundred seventy-three million, one hundred forty-four thousand, two hundred fifty-seven".