41400865818 has 48 divisors (see below), whose sum is σ = 96875873640. Its totient is φ = 12702615552.

The previous prime is 41400865817. The next prime is 41400865853. The reversal of 41400865818 is 81856800414.

It can be written as a sum of positive squares in 4 ways, for example, as 31020720129 + 10380145689 = 176127^2 + 101883^2 .

It is not an unprimeable number, because it can be changed into a prime (41400865817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168003 + ... + 333206.

Almost surely, 2^41400865818 is an apocalyptic number.

41400865818 is an abundant number, since it is smaller than the sum of its proper divisors (55475007822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

41400865818 is a wasteful number, since it uses less digits than its factorization.

41400865818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501583 (or 501580 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 41400865818 in words is "forty-one billion, four hundred million, eight hundred sixty-five thousand, eight hundred eighteen".