409190855081 has 2 divisors, whose sum is σ = 409190855082. Its totient is φ = 409190855080.

The previous prime is 409190855057. The next prime is 409190855111. The reversal of 409190855081 is 180558091904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254021040025 + 155169815056 = 504005^2 + 393916^2 .

It is a cyclic number.

It is not a de Polignac number, because 409190855081 - 2³⁸ = 134312948137 is a prime.

It is a super-2 number, since 2×409190855081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (409190855011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204595427540 + 204595427541.

It is an arithmetic number, because the mean of its divisors is an integer number (204595427541).

Almost surely, 2^409190855081 is an apocalyptic number.

It is an amenable number.

409190855081 is a deficient number, since it is larger than the sum of its proper divisors (1).

409190855081 is an equidigital number, since it uses as much as digits as its factorization.

409190855081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 50.

The spelling of 409190855081 in words is "four hundred nine billion, one hundred ninety million, eight hundred fifty-five thousand, eighty-one".