40394960819 has 2 divisors, whose sum is σ = 40394960820. Its totient is φ = 40394960818.

The previous prime is 40394960803. The next prime is 40394960857. The reversal of 40394960819 is 91806949304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40394960819 - 2⁴ = 40394960803 is a prime.

It is a super-2 number, since 2×40394960819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40394360819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20197480409 + 20197480410.

It is an arithmetic number, because the mean of its divisors is an integer number (20197480410).

Almost surely, 2^40394960819 is an apocalyptic number.

40394960819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40394960819 is an equidigital number, since it uses as much as digits as its factorization.

40394960819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 40394960819 in words is "forty billion, three hundred ninety-four million, nine hundred sixty thousand, eight hundred nineteen".