40591744693 has 4 divisors (see below), whose sum is σ = 40594354560. Its totient is φ = 40589134828.

The previous prime is 40591744667. The next prime is 40591744811. The reversal of 40591744693 is 39644719504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40591744693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40591744693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40591744663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281463 + ... + 1312756.

It is an arithmetic number, because the mean of its divisors is an integer number (10148588640).

Almost surely, 2^40591744693 is an apocalyptic number.

It is an amenable number.

40591744693 is a deficient number, since it is larger than the sum of its proper divisors (2609867).

40591744693 is a wasteful number, since it uses less digits than its factorization.

40591744693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609866.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 40591744693 in words is "forty billion, five hundred ninety-one million, seven hundred forty-four thousand, six hundred ninety-three".