40065126531 has 4 divisors (see below), whose sum is σ = 53420168712. Its totient is φ = 26710084352.

The previous prime is 40065126467. The next prime is 40065126539. The reversal of 40065126531 is 13562156004.

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 40065126531 - 2⁶ = 40065126467 is a prime.

It is a super-2 number, since 2×40065126531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40065126492 and 40065126501.

It is not an unprimeable number, because it can be changed into a prime (40065126539) 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, 6677521086 + ... + 6677521091.

It is an arithmetic number, because the mean of its divisors is an integer number (13355042178).

Almost surely, 2^40065126531 is an apocalyptic number.

40065126531 is a deficient number, since it is larger than the sum of its proper divisors (13355042181).

40065126531 is a wasteful number, since it uses less digits than its factorization.

40065126531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13355042180.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 40065126531 in words is "forty billion, sixty-five million, one hundred twenty-six thousand, five hundred thirty-one".