207138152449 has 4 divisors (see below), whose sum is σ = 207724946436. Its totient is φ = 206551358464.

The previous prime is 207138152447. The next prime is 207138152461. The reversal of 207138152449 is 944251831702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76083292224 + 131054860225 = 275832^2 + 362015^2 .

It is a cyclic number.

It is not a de Polignac number, because 207138152449 - 2¹ = 207138152447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 207138152399 and 207138152408.

It is not an unprimeable number, because it can be changed into a prime (207138152443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293396464 + ... + 293397169.

It is an arithmetic number, because the mean of its divisors is an integer number (51931236609).

Almost surely, 2^207138152449 is an apocalyptic number.

It is an amenable number.

207138152449 is a deficient number, since it is larger than the sum of its proper divisors (586793987).

207138152449 is an equidigital number, since it uses as much as digits as its factorization.

207138152449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586793986.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 207138152449 in words is "two hundred seven billion, one hundred thirty-eight million, one hundred fifty-two thousand, four hundred forty-nine".