40693744991 has 4 divisors (see below), whose sum is σ = 40697763984. Its totient is φ = 40689726000.

The previous prime is 40693744943. The next prime is 40693745011. The reversal of 40693744991 is 19944739604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40693744991 - 2¹⁰ = 40693743967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40623744991) 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 in 3 ways as a sum of consecutive naturals, for example, 1994270 + ... + 2014571.

It is an arithmetic number, because the mean of its divisors is an integer number (10174440996).

Almost surely, 2^40693744991 is an apocalyptic number.

40693744991 is a deficient number, since it is larger than the sum of its proper divisors (4018993).

40693744991 is a wasteful number, since it uses less digits than its factorization.

40693744991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018992.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 40693744991 in words is "forty billion, six hundred ninety-three million, seven hundred forty-four thousand, nine hundred ninety-one".