40505898913 has 2 divisors, whose sum is σ = 40505898914. Its totient is φ = 40505898912.

The previous prime is 40505898893. The next prime is 40505898941. The reversal of 40505898913 is 31989850504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39751188129 + 754710784 = 199377^2 + 27472^2 .

It is a cyclic number.

It is not a de Polignac number, because 40505898913 - 2¹³ = 40505890721 is a prime.

It is not a weakly prime, because it can be changed into another prime (40505898413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252949456 + 20252949457.

It is an arithmetic number, because the mean of its divisors is an integer number (20252949457).

Almost surely, 2^40505898913 is an apocalyptic number.

It is an amenable number.

40505898913 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505898913 is an equidigital number, since it uses as much as digits as its factorization.

40505898913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 40505898913 in words is "forty billion, five hundred five million, eight hundred ninety-eight thousand, nine hundred thirteen".