1311172709847 has 64 divisors (see below), whose sum is σ = 2347786076160. Its totient is φ = 628597065600.

The previous prime is 1311172709839. The next prime is 1311172709851. The reversal of 1311172709847 is 7489072711131.

It is not a de Polignac number, because 1311172709847 - 2³ = 1311172709839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311172709847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311172709747) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14462304 + ... + 14552682.

It is an arithmetic number, because the mean of its divisors is an integer number (36684157440).

Almost surely, 2^{1311172709847} is an apocalyptic number.

1311172709847 is a deficient number, since it is larger than the sum of its proper divisors (1036613366313).

1311172709847 is a wasteful number, since it uses less digits than its factorization.

1311172709847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95244.

The product of its (nonzero) digits is 592704, while the sum is 51.

The spelling of 1311172709847 in words is "one trillion, three hundred eleven billion, one hundred seventy-two million, seven hundred nine thousand, eight hundred forty-seven".