361603639849 has 2 divisors, whose sum is σ = 361603639850. Its totient is φ = 361603639848.

The previous prime is 361603639847. The next prime is 361603639879. The reversal of 361603639849 is 948936306163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269859470400 + 91744169449 = 519480^2 + 302893^2 .

It is a cyclic number.

It is not a de Polignac number, because 361603639849 - 2¹ = 361603639847 is a prime.

Together with 361603639847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 361603639793 and 361603639802.

It is not a weakly prime, because it can be changed into another prime (361603639847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180801819924 + 180801819925.

It is an arithmetic number, because the mean of its divisors is an integer number (180801819925).

Almost surely, 2^361603639849 is an apocalyptic number.

It is an amenable number.

361603639849 is a deficient number, since it is larger than the sum of its proper divisors (1).

361603639849 is an equidigital number, since it uses as much as digits as its factorization.

361603639849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 58.

The spelling of 361603639849 in words is "three hundred sixty-one billion, six hundred three million, six hundred thirty-nine thousand, eight hundred forty-nine".