74516161649 has 2 divisors, whose sum is σ = 74516161650. Its totient is φ = 74516161648.

The previous prime is 74516161631. The next prime is 74516161651. The reversal of 74516161649 is 94616161547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47288851600 + 27227310049 = 217460^2 + 165007^2 .

It is a cyclic number.

It is not a de Polignac number, because 74516161649 - 2²⁸ = 74247726193 is a prime.

Together with 74516161651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74516161597 and 74516161606.

It is not a weakly prime, because it can be changed into another prime (74516161849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37258080824 + 37258080825.

It is an arithmetic number, because the mean of its divisors is an integer number (37258080825).

Almost surely, 2^74516161649 is an apocalyptic number.

It is an amenable number.

74516161649 is a deficient number, since it is larger than the sum of its proper divisors (1).

74516161649 is an equidigital number, since it uses as much as digits as its factorization.

74516161649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The spelling of 74516161649 in words is "seventy-four billion, five hundred sixteen million, one hundred sixty-one thousand, six hundred forty-nine".