1312256551850 has 24 divisors (see below), whose sum is σ = 2445308876748. Its totient is φ = 523932364800.

The previous prime is 1312256551777. The next prime is 1312256551861. The reversal of 1312256551850 is 581556522131.

It can be written as a sum of positive squares in 6 ways, for example, as 68944580329 + 1243311971521 = 262573^2 + 1115039^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24229079 + ... + 24283178.

Almost surely, 2^{1312256551850} is an apocalyptic number.

1312256551850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312256551850 is a deficient number, since it is larger than the sum of its proper divisors (1133052324898).

1312256551850 is a wasteful number, since it uses less digits than its factorization.

1312256551850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48512810 (or 48512805 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 44.

The spelling of 1312256551850 in words is "one trillion, three hundred twelve billion, two hundred fifty-six million, five hundred fifty-one thousand, eight hundred fifty".