40505898893 has 2 divisors, whose sum is σ = 40505898894. Its totient is φ = 40505898892.

The previous prime is 40505898883. The next prime is 40505898913. The reversal of 40505898893 is 39889850504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40482647209 + 23251684 = 201203^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 40505898893 - 2⁴ = 40505898877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505898883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252949446 + 20252949447.

It is an arithmetic number, because the mean of its divisors is an integer number (20252949447).

Almost surely, 2^40505898893 is an apocalyptic number.

It is an amenable number.

40505898893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505898893 is an equidigital number, since it uses as much as digits as its factorization.

40505898893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12441600, while the sum is 59.

The spelling of 40505898893 in words is "forty billion, five hundred five million, eight hundred ninety-eight thousand, eight hundred ninety-three".