33146731861 has 2 divisors, whose sum is σ = 33146731862. Its totient is φ = 33146731860.

The previous prime is 33146731853. The next prime is 33146731873. The reversal of 33146731861 is 16813764133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32213429361 + 933302500 = 179481^2 + 30550^2 .

It is a cyclic number.

It is not a de Polignac number, because 33146731861 - 2³ = 33146731853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33146731831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16573365930 + 16573365931.

It is an arithmetic number, because the mean of its divisors is an integer number (16573365931).

Almost surely, 2^33146731861 is an apocalyptic number.

It is an amenable number.

33146731861 is a deficient number, since it is larger than the sum of its proper divisors (1).

33146731861 is an equidigital number, since it uses as much as digits as its factorization.

33146731861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The spelling of 33146731861 in words is "thirty-three billion, one hundred forty-six million, seven hundred thirty-one thousand, eight hundred sixty-one".