40865036819 has 2 divisors, whose sum is σ = 40865036820. Its totient is φ = 40865036818.

The previous prime is 40865036759. The next prime is 40865036827. The reversal of 40865036819 is 91863056804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40865036819 - 2¹² = 40865032723 is a prime.

It is a super-2 number, since 2×40865036819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40865036879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20432518409 + 20432518410.

It is an arithmetic number, because the mean of its divisors is an integer number (20432518410).

Almost surely, 2^40865036819 is an apocalyptic number.

40865036819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40865036819 is an equidigital number, since it uses as much as digits as its factorization.

40865036819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 40865036819 in words is "forty billion, eight hundred sixty-five million, thirty-six thousand, eight hundred nineteen".