33890033861 has 2 divisors, whose sum is σ = 33890033862. Its totient is φ = 33890033860.

The previous prime is 33890033819. The next prime is 33890033887. The reversal of 33890033861 is 16833009833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32799383236 + 1090650625 = 181106^2 + 33025^2 .

It is a cyclic number.

It is not a de Polignac number, because 33890033861 - 2⁶ = 33890033797 is a prime.

It is a super-2 number, since 2×33890033861² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33890053861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16945016930 + 16945016931.

It is an arithmetic number, because the mean of its divisors is an integer number (16945016931).

Almost surely, 2^33890033861 is an apocalyptic number.

It is an amenable number.

33890033861 is a deficient number, since it is larger than the sum of its proper divisors (1).

33890033861 is an equidigital number, since it uses as much as digits as its factorization.

33890033861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 33890033861 in words is "thirty-three billion, eight hundred ninety million, thirty-three thousand, eight hundred sixty-one".