40033332991 has 2 divisors, whose sum is σ = 40033332992. Its totient is φ = 40033332990.

The previous prime is 40033332971. The next prime is 40033333007. The reversal of 40033332991 is 19923333004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40033332991 - 2⁵ = 40033332959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40033332991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40033332901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20016666495 + 20016666496.

It is an arithmetic number, because the mean of its divisors is an integer number (20016666496).

Almost surely, 2^40033332991 is an apocalyptic number.

40033332991 is a deficient number, since it is larger than the sum of its proper divisors (1).

40033332991 is an equidigital number, since it uses as much as digits as its factorization.

40033332991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 37.

Adding to 40033332991 its reverse (19923333004), we get a palindrome (59956665995).

The spelling of 40033332991 in words is "forty billion, thirty-three million, three hundred thirty-two thousand, nine hundred ninety-one".