40423211091 has 24 divisors (see below), whose sum is σ = 61020120096. Its totient is φ = 25738035840.

The previous prime is 40423211009. The next prime is 40423211093. The reversal of 40423211091 is 19011232404.

It is a happy number.

40423211091 is a `hidden beast` number, since 40 + 423 + 2 + 110 + 91 = 666.

It is not a de Polignac number, because 40423211091 - 2⁹ = 40423210579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40423211093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10890 + ... + 284543.

It is an arithmetic number, because the mean of its divisors is an integer number (2542505004).

Almost surely, 2^40423211091 is an apocalyptic number.

40423211091 is a deficient number, since it is larger than the sum of its proper divisors (20596909005).

40423211091 is a wasteful number, since it uses less digits than its factorization.

40423211091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296123 (or 296120 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 40423211091 its reverse (19011232404), we get a palindrome (59434443495).

The spelling of 40423211091 in words is "forty billion, four hundred twenty-three million, two hundred eleven thousand, ninety-one".