40198605813 has 12 divisors (see below), whose sum is σ = 58071045708. Its totient is φ = 26796120000.

The previous prime is 40198605791. The next prime is 40198605823. The reversal of 40198605813 is 31850689104.

40198605813 is a `hidden beast` number, since 4 + 0 + 1 + 9 + 8 + 60 + 581 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1711228689 + 38487377124 = 41367^2 + 196182^2 .

It is not a de Polignac number, because 40198605813 - 2⁵ = 40198605781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40198605823) 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 11 ways as a sum of consecutive naturals, for example, 157938 + ... + 324563.

It is an arithmetic number, because the mean of its divisors is an integer number (4839253809).

Almost surely, 2^40198605813 is an apocalyptic number.

It is an amenable number.

40198605813 is a deficient number, since it is larger than the sum of its proper divisors (17872439895).

40198605813 is a wasteful number, since it uses less digits than its factorization.

40198605813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491764 (or 491761 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 40198605813 in words is "forty billion, one hundred ninety-eight million, six hundred five thousand, eight hundred thirteen".