16354299961861 has 2 divisors, whose sum is σ = 16354299961862. Its totient is φ = 16354299961860.

The previous prime is 16354299961841. The next prime is 16354299961873. The reversal of 16354299961861 is 16816999245361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14943713804100 + 1410586157761 = 3865710^2 + 1187681^2 .

It is a cyclic number.

It is not a de Polignac number, because 16354299961861 - 2⁷ = 16354299961733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16354299961841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8177149980930 + 8177149980931.

It is an arithmetic number, because the mean of its divisors is an integer number (8177149980931).

Almost surely, 2^{16354299961861} is an apocalyptic number.

It is an amenable number.

16354299961861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16354299961861 is an equidigital number, since it uses as much as digits as its factorization.

16354299961861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151165440, while the sum is 70.

The spelling of 16354299961861 in words is "sixteen trillion, three hundred fifty-four billion, two hundred ninety-nine million, nine hundred sixty-one thousand, eight hundred sixty-one".