33868105861 has 2 divisors, whose sum is σ = 33868105862. Its totient is φ = 33868105860.

The previous prime is 33868105849. The next prime is 33868105897. The reversal of 33868105861 is 16850186833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17533732225 + 16334373636 = 132415^2 + 127806^2 .

It is a cyclic number.

It is not a de Polignac number, because 33868105861 - 2²⁹ = 33331234949 is a prime.

It is a super-2 number, since 2×33868105861² (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 (33868105261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16934052930 + 16934052931.

It is an arithmetic number, because the mean of its divisors is an integer number (16934052931).

Almost surely, 2^33868105861 is an apocalyptic number.

It is an amenable number.

33868105861 is a deficient number, since it is larger than the sum of its proper divisors (1).

33868105861 is an equidigital number, since it uses as much as digits as its factorization.

33868105861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 33868105861 in words is "thirty-three billion, eight hundred sixty-eight million, one hundred five thousand, eight hundred sixty-one".