1312063644 has 24 divisors (see below), whose sum is σ = 3132680320. Its totient is φ = 427183344.

The previous prime is 1312063637. The next prime is 1312063651. The reversal of 1312063644 is 4463602131.

It is an interprime number because it is at equal distance from previous prime (1312063637) and next prime (1312063651).

It is a super-2 number, since 2×1312063644² = 3443022011813117472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270864 + ... + 1271895.

Almost surely, 2^1312063644 is an apocalyptic number.

It is an amenable number.

1312063644 is an abundant number, since it is smaller than the sum of its proper divisors (1820616676).

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

1312063644 is a wasteful number, since it uses less digits than its factorization.

1312063644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542809 (or 2542807 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1312063644 is about 36222.4190799013. The cubic root of 1312063644 is about 1094.7584363196.

Adding to 1312063644 its reverse (4463602131), we get a palindrome (5775665775).

The spelling of 1312063644 in words is "one billion, three hundred twelve million, sixty-three thousand, six hundred forty-four".