40321800913 has 2 divisors, whose sum is σ = 40321800914. Its totient is φ = 40321800912.

The previous prime is 40321800889. The next prime is 40321800929. The reversal of 40321800913 is 31900812304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35196386449 + 5125414464 = 187607^2 + 71592^2 .

It is a cyclic number.

It is not a de Polignac number, because 40321800913 - 2⁵ = 40321800881 is a prime.

It is not a weakly prime, because it can be changed into another prime (40321806913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160900456 + 20160900457.

It is an arithmetic number, because the mean of its divisors is an integer number (20160900457).

Almost surely, 2^40321800913 is an apocalyptic number.

It is an amenable number.

40321800913 is a deficient number, since it is larger than the sum of its proper divisors (1).

40321800913 is an equidigital number, since it uses as much as digits as its factorization.

40321800913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 40321800913 in words is "forty billion, three hundred twenty-one million, eight hundred thousand, nine hundred thirteen".