245311444440025 has 24 divisors (see below), whose sum is σ = 304325388948600. Its totient is φ = 196159359037440.

The previous prime is 245311444439917. The next prime is 245311444440043. The reversal of 245311444440025 is 520044444113542.

It can be written as a sum of positive squares in 12 ways, for example, as 49492730501449 + 195818713938576 = 7035107^2 + 13993524^2 .

It is a de Polignac number, because none of the positive numbers 2^k-245311444440025 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1288894269 + ... + 1289084581.

It is an arithmetic number, because the mean of its divisors is an integer number (12680224539525).

Almost surely, 2^{245311444440025} is an apocalyptic number.

245311444440025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

245311444440025 is a deficient number, since it is larger than the sum of its proper divisors (59013944508575).

245311444440025 is a wasteful number, since it uses less digits than its factorization.

245311444440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213645 (or 213640 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 43.

Adding to 245311444440025 its reverse (520044444113542), we get a palindrome (765355888553567).

The spelling of 245311444440025 in words is "two hundred forty-five trillion, three hundred eleven billion, four hundred forty-four million, four hundred forty thousand, twenty-five".