1061992451549 has 2 divisors, whose sum is σ = 1061992451550. Its totient is φ = 1061992451548.

The previous prime is 1061992451497. The next prime is 1061992451609. The reversal of 1061992451549 is 9451542991601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1045475575225 + 16516876324 = 1022485^2 + 128518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061992451549 is a prime.

It is a super-2 number, since 2×1061992451549² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1061992451494 and 1061992451503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061992453549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530996225774 + 530996225775.

It is an arithmetic number, because the mean of its divisors is an integer number (530996225775).

Almost surely, 2^{1061992451549} is an apocalyptic number.

It is an amenable number.

1061992451549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061992451549 is an equidigital number, since it uses as much as digits as its factorization.

1061992451549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 1061992451549 in words is "one trillion, sixty-one billion, nine hundred ninety-two million, four hundred fifty-one thousand, five hundred forty-nine".