33768721379 has 2 divisors, whose sum is σ = 33768721380. Its totient is φ = 33768721378.

The previous prime is 33768721373. The next prime is 33768721403. The reversal of 33768721379 is 97312786733.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33768721379 is a prime.

It is a super-2 number, since 2×33768721379² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (33768721373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16884360689 + 16884360690.

It is an arithmetic number, because the mean of its divisors is an integer number (16884360690).

Almost surely, 2^33768721379 is an apocalyptic number.

33768721379 is a deficient number, since it is larger than the sum of its proper divisors (1).

33768721379 is an equidigital number, since it uses as much as digits as its factorization.

33768721379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 56.

The spelling of 33768721379 in words is "thirty-three billion, seven hundred sixty-eight million, seven hundred twenty-one thousand, three hundred seventy-nine".