1312516350665 has 8 divisors (see below), whose sum is σ = 1696174976328. Its totient is φ = 969242843520.

The previous prime is 1312516350661. The next prime is 1312516350667. The reversal of 1312516350665 is 5660536152131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49884329104 + 1262632021561 = 223348^2 + 1123669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312516350665 - 2² = 1312516350661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312516350661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10096279556 + ... + 10096279685.

It is an arithmetic number, because the mean of its divisors is an integer number (212021872041).

Almost surely, 2^{1312516350665} is an apocalyptic number.

It is an amenable number.

1312516350665 is a deficient number, since it is larger than the sum of its proper divisors (383658625663).

1312516350665 is a wasteful number, since it uses less digits than its factorization.

1312516350665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192559259.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 1312516350665 in words is "one trillion, three hundred twelve billion, five hundred sixteen million, three hundred fifty thousand, six hundred sixty-five".