16722744761 has 2 divisors, whose sum is σ = 16722744762. Its totient is φ = 16722744760.

The previous prime is 16722744751. The next prime is 16722744767. The reversal of 16722744761 is 16744722761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16095743161 + 627001600 = 126869^2 + 25040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16722744761 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16722744767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361372380 + 8361372381.

It is an arithmetic number, because the mean of its divisors is an integer number (8361372381).

Almost surely, 2^16722744761 is an apocalyptic number.

It is an amenable number.

16722744761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16722744761 is an equidigital number, since it uses as much as digits as its factorization.

16722744761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 47.

The spelling of 16722744761 in words is "sixteen billion, seven hundred twenty-two million, seven hundred forty-four thousand, seven hundred sixty-one".