40506665131 has 4 divisors (see below), whose sum is σ = 40664278872. Its totient is φ = 40349051392.

The previous prime is 40506665099. The next prime is 40506665161. The reversal of 40506665131 is 13156660504.

40506665131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40506665131 - 2⁵ = 40506665099 is a prime.

It is a super-2 number, since 2×40506665131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40506665161) 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, 78806485 + ... + 78806998.

It is an arithmetic number, because the mean of its divisors is an integer number (10166069718).

Almost surely, 2^40506665131 is an apocalyptic number.

40506665131 is a deficient number, since it is larger than the sum of its proper divisors (157613741).

40506665131 is a wasteful number, since it uses less digits than its factorization.

40506665131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157613740.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 40506665131 in words is "forty billion, five hundred six million, six hundred sixty-five thousand, one hundred thirty-one".