245321631361 has 4 divisors (see below), whose sum is σ = 245359843924. Its totient is φ = 245283418800.

The previous prime is 245321631337. The next prime is 245321631367. The reversal of 245321631361 is 163136123542.

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 171525192336 + 73796439025 = 414156^2 + 271655^2 .

It is a cyclic number.

It is not a de Polignac number, because 245321631361 - 2¹¹ = 245321629313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245321631361.

It is not an unprimeable number, because it can be changed into a prime (245321631367) 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 in 3 ways as a sum of consecutive naturals, for example, 19096650 + ... + 19109491.

It is an arithmetic number, because the mean of its divisors is an integer number (61339960981).

Almost surely, 2^245321631361 is an apocalyptic number.

It is an amenable number.

245321631361 is a deficient number, since it is larger than the sum of its proper divisors (38212563).

245321631361 is an equidigital number, since it uses as much as digits as its factorization.

245321631361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38212562.

The product of its digits is 77760, while the sum is 37.

The spelling of 245321631361 in words is "two hundred forty-five billion, three hundred twenty-one million, six hundred thirty-one thousand, three hundred sixty-one".