39448650641 has 2 divisors, whose sum is σ = 39448650642. Its totient is φ = 39448650640.

The previous prime is 39448650581. The next prime is 39448650643. The reversal of 39448650641 is 14605684493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25306446400 + 14142204241 = 159080^2 + 118921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39448650641 is a prime.

Together with 39448650643, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39448650641.

It is not a weakly prime, because it can be changed into another prime (39448650643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19724325320 + 19724325321.

It is an arithmetic number, because the mean of its divisors is an integer number (19724325321).

Almost surely, 2^39448650641 is an apocalyptic number.

It is an amenable number.

39448650641 is a deficient number, since it is larger than the sum of its proper divisors (1).

39448650641 is an equidigital number, since it uses as much as digits as its factorization.

39448650641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 39448650641 in words is "thirty-nine billion, four hundred forty-eight million, six hundred fifty thousand, six hundred forty-one".