409147674581 has 2 divisors, whose sum is σ = 409147674582. Its totient is φ = 409147674580.

The previous prime is 409147674577. The next prime is 409147674671. The reversal of 409147674581 is 185476741904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268773812356 + 140373862225 = 518434^2 + 374665^2 .

It is a cyclic number.

It is not a de Polignac number, because 409147674581 - 2² = 409147674577 is a prime.

It is a super-2 number, since 2×409147674581² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409147274581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204573837290 + 204573837291.

It is an arithmetic number, because the mean of its divisors is an integer number (204573837291).

Almost surely, 2^409147674581 is an apocalyptic number.

It is an amenable number.

409147674581 is a deficient number, since it is larger than the sum of its proper divisors (1).

409147674581 is an equidigital number, since it uses as much as digits as its factorization.

409147674581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 409147674581 in words is "four hundred nine billion, one hundred forty-seven million, six hundred seventy-four thousand, five hundred eighty-one".