40920047591 has 16 divisors (see below), whose sum is σ = 43818884928. Its totient is φ = 38078323200.

The previous prime is 40920047579. The next prime is 40920047599. The reversal of 40920047591 is 19574002904.

It is a cyclic number.

It is not a de Polignac number, because 40920047591 - 2¹⁸ = 40919785447 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 (40920047599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493886 + ... + 570756.

It is an arithmetic number, because the mean of its divisors is an integer number (2738680308).

Almost surely, 2^40920047591 is an apocalyptic number.

40920047591 is a deficient number, since it is larger than the sum of its proper divisors (2898837337).

40920047591 is a wasteful number, since it uses less digits than its factorization.

40920047591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77242.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 40920047591 in words is "forty billion, nine hundred twenty million, forty-seven thousand, five hundred ninety-one".