404431774342091 has 2 divisors, whose sum is σ = 404431774342092. Its totient is φ = 404431774342090.

The previous prime is 404431774342081. The next prime is 404431774342103. The reversal of 404431774342091 is 190243477134404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404431774342091 is a prime.

It is a super-2 number, since 2×404431774342091² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (404431774342021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202215887171045 + 202215887171046.

It is an arithmetic number, because the mean of its divisors is an integer number (202215887171046).

Almost surely, 2^{404431774342091} is an apocalyptic number.

404431774342091 is a deficient number, since it is larger than the sum of its proper divisors (1).

404431774342091 is an equidigital number, since it uses as much as digits as its factorization.

404431774342091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 404431774342091 in words is "four hundred four trillion, four hundred thirty-one billion, seven hundred seventy-four million, three hundred forty-two thousand, ninety-one".