40645039933 has 2 divisors, whose sum is σ = 40645039934. Its totient is φ = 40645039932.

The previous prime is 40645039907. The next prime is 40645039949. The reversal of 40645039933 is 33993054604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39179451844 + 1465588089 = 197938^2 + 38283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40645039933 is a prime.

It is a super-3 number, since 3×40645039933³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40645034933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20322519966 + 20322519967.

It is an arithmetic number, because the mean of its divisors is an integer number (20322519967).

Almost surely, 2^40645039933 is an apocalyptic number.

It is an amenable number.

40645039933 is a deficient number, since it is larger than the sum of its proper divisors (1).

40645039933 is an equidigital number, since it uses as much as digits as its factorization.

40645039933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 46.

The spelling of 40645039933 in words is "forty billion, six hundred forty-five million, thirty-nine thousand, nine hundred thirty-three".