39672365549 has 2 divisors, whose sum is σ = 39672365550. Its totient is φ = 39672365548.

The previous prime is 39672365543. The next prime is 39672365567. The reversal of 39672365549 is 94556327693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34252755625 + 5419609924 = 185075^2 + 73618^2 .

It is a cyclic number.

It is not a de Polignac number, because 39672365549 - 2³² = 35377398253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39672365543) 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, 19836182774 + 19836182775.

It is an arithmetic number, because the mean of its divisors is an integer number (19836182775).

Almost surely, 2^39672365549 is an apocalyptic number.

It is an amenable number.

39672365549 is a deficient number, since it is larger than the sum of its proper divisors (1).

39672365549 is an equidigital number, since it uses as much as digits as its factorization.

39672365549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 59.

The spelling of 39672365549 in words is "thirty-nine billion, six hundred seventy-two million, three hundred sixty-five thousand, five hundred forty-nine".