39813586513 has 2 divisors, whose sum is σ = 39813586514. Its totient is φ = 39813586512.

The previous prime is 39813586481. The next prime is 39813586601. The reversal of 39813586513 is 31568531893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26337394944 + 13476191569 = 162288^2 + 116087^2 .

It is a cyclic number.

It is not a de Polignac number, because 39813586513 - 2⁵ = 39813586481 is a prime.

It is not a weakly prime, because it can be changed into another prime (39813586913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19906793256 + 19906793257.

It is an arithmetic number, because the mean of its divisors is an integer number (19906793257).

Almost surely, 2^39813586513 is an apocalyptic number.

It is an amenable number.

39813586513 is a deficient number, since it is larger than the sum of its proper divisors (1).

39813586513 is an equidigital number, since it uses as much as digits as its factorization.

39813586513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 52.

The spelling of 39813586513 in words is "thirty-nine billion, eight hundred thirteen million, five hundred eighty-six thousand, five hundred thirteen".