409564228919 has 2 divisors, whose sum is σ = 409564228920. Its totient is φ = 409564228918.

The previous prime is 409564228873. The next prime is 409564228921. The reversal of 409564228919 is 919822465904.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409564228919 is a prime.

It is a super-2 number, since 2×409564228919² (a number of 24 digits) contains 22 as substring.

Together with 409564228921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409564228979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204782114459 + 204782114460.

It is an arithmetic number, because the mean of its divisors is an integer number (204782114460).

Almost surely, 2^409564228919 is an apocalyptic number.

409564228919 is a deficient number, since it is larger than the sum of its proper divisors (1).

409564228919 is an equidigital number, since it uses as much as digits as its factorization.

409564228919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 409564228919 in words is "four hundred nine billion, five hundred sixty-four million, two hundred twenty-eight thousand, nine hundred nineteen".