33640464817 has 2 divisors, whose sum is σ = 33640464818. Its totient is φ = 33640464816.

The previous prime is 33640464761. The next prime is 33640464821. The reversal of 33640464817 is 71846404633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33635193201 + 5271616 = 183399^2 + 2296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33640464817 is a prime.

It is a super-2 number, since 2×33640464817² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33640464017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16820232408 + 16820232409.

It is an arithmetic number, because the mean of its divisors is an integer number (16820232409).

Almost surely, 2^33640464817 is an apocalyptic number.

It is an amenable number.

33640464817 is a deficient number, since it is larger than the sum of its proper divisors (1).

33640464817 is an equidigital number, since it uses as much as digits as its factorization.

33640464817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 33640464817 in words is "thirty-three billion, six hundred forty million, four hundred sixty-four thousand, eight hundred seventeen".