1677447196609 has 2 divisors, whose sum is σ = 1677447196610. Its totient is φ = 1677447196608.

The previous prime is 1677447196541. The next prime is 1677447196627. The reversal of 1677447196609 is 9066917447761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1412045007025 + 265402189584 = 1188295^2 + 515172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1677447196609 is a prime.

It is a super-2 number, since 2×1677447196609² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1677447196669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838723598304 + 838723598305.

It is an arithmetic number, because the mean of its divisors is an integer number (838723598305).

Almost surely, 2^{1677447196609} is an apocalyptic number.

It is an amenable number.

1677447196609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1677447196609 is an equidigital number, since it uses as much as digits as its factorization.

1677447196609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96018048, while the sum is 67.

The spelling of 1677447196609 in words is "one trillion, six hundred seventy-seven billion, four hundred forty-seven million, one hundred ninety-six thousand, six hundred nine".