39801519449 has 2 divisors, whose sum is σ = 39801519450. Its totient is φ = 39801519448.

The previous prime is 39801519437. The next prime is 39801519517. The reversal of 39801519449 is 94491510893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39097943824 + 703575625 = 197732^2 + 26525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39801519449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39801519449.

It is not a weakly prime, because it can be changed into another prime (39801519749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19900759724 + 19900759725.

It is an arithmetic number, because the mean of its divisors is an integer number (19900759725).

Almost surely, 2^39801519449 is an apocalyptic number.

It is an amenable number.

39801519449 is a deficient number, since it is larger than the sum of its proper divisors (1).

39801519449 is an equidigital number, since it uses as much as digits as its factorization.

39801519449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 39801519449 in words is "thirty-nine billion, eight hundred one million, five hundred nineteen thousand, four hundred forty-nine".