33640463939 has 2 divisors, whose sum is σ = 33640463940. Its totient is φ = 33640463938.

The previous prime is 33640463917. The next prime is 33640463951. The reversal of 33640463939 is 93936404633.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33640463939 - 2⁸ = 33640463683 is a prime.

It is a super-2 number, since 2×33640463939² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33640463999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16820231969 + 16820231970.

It is an arithmetic number, because the mean of its divisors is an integer number (16820231970).

Almost surely, 2^33640463939 is an apocalyptic number.

33640463939 is a deficient number, since it is larger than the sum of its proper divisors (1).

33640463939 is an equidigital number, since it uses as much as digits as its factorization.

33640463939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 50.

The spelling of 33640463939 in words is "thirty-three billion, six hundred forty million, four hundred sixty-three thousand, nine hundred thirty-nine".