2307993151661 has 2 divisors, whose sum is σ = 2307993151662. Its totient is φ = 2307993151660.

The previous prime is 2307993151621. The next prime is 2307993151733. The reversal of 2307993151661 is 1661513997032.

2307993151661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2247270828100 + 60722323561 = 1499090^2 + 246419^2 .

It is a cyclic number.

It is not a de Polignac number, because 2307993151661 - 2³⁸ = 2033115244717 is a prime.

It is a super-2 number, since 2×2307993151661² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2307993151621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1153996575830 + 1153996575831.

It is an arithmetic number, because the mean of its divisors is an integer number (1153996575831).

Almost surely, 2^{2307993151661} is an apocalyptic number.

It is an amenable number.

2307993151661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2307993151661 is an equidigital number, since it uses as much as digits as its factorization.

2307993151661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 2307993151661 in words is "two trillion, three hundred seven billion, nine hundred ninety-three million, one hundred fifty-one thousand, six hundred sixty-one".