408641847881 has 2 divisors, whose sum is σ = 408641847882. Its totient is φ = 408641847880.

The previous prime is 408641847871. The next prime is 408641847917. The reversal of 408641847881 is 188748146804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407119287481 + 1522560400 = 638059^2 + 39020^2 .

It is a cyclic number.

It is not a de Polignac number, because 408641847881 - 2²² = 408637653577 is a prime.

It is a super-3 number, since 3×408641847881³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 408641847881.

It is not a weakly prime, because it can be changed into another prime (408641847871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204320923940 + 204320923941.

It is an arithmetic number, because the mean of its divisors is an integer number (204320923941).

Almost surely, 2^408641847881 is an apocalyptic number.

It is an amenable number.

408641847881 is a deficient number, since it is larger than the sum of its proper divisors (1).

408641847881 is an equidigital number, since it uses as much as digits as its factorization.

408641847881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11010048, while the sum is 59.

The spelling of 408641847881 in words is "four hundred eight billion, six hundred forty-one million, eight hundred forty-seven thousand, eight hundred eighty-one".