1305631634312 has 8 divisors (see below), whose sum is σ = 2448059314350. Its totient is φ = 652815817152.

The previous prime is 1305631634309. The next prime is 1305631634317. The reversal of 1305631634312 is 2134361365031.

It can be written as a sum of positive squares in only one way, i.e., 657017240356 + 648614393956 = 810566^2 + 805366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1305631634317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81601977137 + ... + 81601977152.

Almost surely, 2^{1305631634312} is an apocalyptic number.

It is an amenable number.

1305631634312 is a deficient number, since it is larger than the sum of its proper divisors (1142427680038).

1305631634312 is a wasteful number, since it uses less digits than its factorization.

1305631634312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163203954295 (or 163203954291 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

Adding to 1305631634312 its reverse (2134361365031), we get a palindrome (3439992999343).

The spelling of 1305631634312 in words is "one trillion, three hundred five billion, six hundred thirty-one million, six hundred thirty-four thousand, three hundred twelve".