40564561031 has 2 divisors, whose sum is σ = 40564561032. Its totient is φ = 40564561030.

The previous prime is 40564560997. The next prime is 40564561069. The reversal of 40564561031 is 13016546504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40564561031 - 2²⁶ = 40497452167 is a prime.

It is a super-2 number, since 2×40564561031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40564560982 and 40564561000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40564561231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20282280515 + 20282280516.

It is an arithmetic number, because the mean of its divisors is an integer number (20282280516).

Almost surely, 2^40564561031 is an apocalyptic number.

40564561031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40564561031 is an equidigital number, since it uses as much as digits as its factorization.

40564561031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 40564561031 in words is "forty billion, five hundred sixty-four million, five hundred sixty-one thousand, thirty-one".