315616381444 has 24 divisors (see below), whose sum is σ = 679789130048. Its totient is φ = 124859227680.

The previous prime is 315616381417. The next prime is 315616381463. The reversal of 315616381444 is 444183616513.

It is a happy number.

It is a super-2 number, since 2×315616381444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315616381394 and 315616381403.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 433538622 + ... + 433539349.

Almost surely, 2^315616381444 is an apocalyptic number.

It is an amenable number.

315616381444 is an abundant number, since it is smaller than the sum of its proper divisors (364172748604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315616381444 is a wasteful number, since it uses less digits than its factorization.

315616381444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867077995 (or 867077993 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

Adding to 315616381444 its reverse (444183616513), we get a palindrome (759799997957).

The spelling of 315616381444 in words is "three hundred fifteen billion, six hundred sixteen million, three hundred eighty-one thousand, four hundred forty-four".