33400040381 has 2 divisors, whose sum is σ = 33400040382. Its totient is φ = 33400040380.

The previous prime is 33400040353. The next prime is 33400040389. The reversal of 33400040381 is 18304000433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32556428356 + 843612025 = 180434^2 + 29045^2 .

It is a cyclic number.

It is not a de Polignac number, because 33400040381 - 2¹⁰ = 33400039357 is a prime.

It is a super-2 number, since 2×33400040381² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33400040381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33400040389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16700020190 + 16700020191.

It is an arithmetic number, because the mean of its divisors is an integer number (16700020191).

Almost surely, 2^33400040381 is an apocalyptic number.

It is an amenable number.

33400040381 is a deficient number, since it is larger than the sum of its proper divisors (1).

33400040381 is an equidigital number, since it uses as much as digits as its factorization.

33400040381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 33400040381 in words is "thirty-three billion, four hundred million, forty thousand, three hundred eighty-one".