39578650919993 has 2 divisors, whose sum is σ = 39578650919994. Its totient is φ = 39578650919992.

The previous prime is 39578650919981. The next prime is 39578650920031. The reversal of 39578650919993 is 39991905687593.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39574315619344 + 4335300649 = 6290812^2 + 65843^2 .

It is an emirp because it is prime and its reverse (39991905687593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39578650919993 - 2¹⁴ = 39578650903609 is a prime.

It is not a weakly prime, because it can be changed into another prime (39578655919993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19789325459996 + 19789325459997.

It is an arithmetic number, because the mean of its divisors is an integer number (19789325459997).

Almost surely, 2^{39578650919993} is an apocalyptic number.

It is an amenable number.

39578650919993 is a deficient number, since it is larger than the sum of its proper divisors (1).

39578650919993 is an equidigital number, since it uses as much as digits as its factorization.

39578650919993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4464104400, while the sum is 83.

The spelling of 39578650919993 in words is "thirty-nine trillion, five hundred seventy-eight billion, six hundred fifty million, nine hundred nineteen thousand, nine hundred ninety-three".