311909478071 has 4 divisors (see below), whose sum is σ = 313492775112. Its totient is φ = 310326181032.

The previous prime is 311909478059. The next prime is 311909478073. The reversal of 311909478071 is 170874909113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170874909113 = 49741 ⋅3435293.

It is a cyclic number.

It is not a de Polignac number, because 311909478071 - 2¹⁸ = 311909215927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311909478073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791648225 + ... + 791648618.

It is an arithmetic number, because the mean of its divisors is an integer number (78373193778).

Almost surely, 2^311909478071 is an apocalyptic number.

311909478071 is a deficient number, since it is larger than the sum of its proper divisors (1583297041).

311909478071 is a wasteful number, since it uses less digits than its factorization.

311909478071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583297040.

The product of its (nonzero) digits is 381024, while the sum is 50.

The spelling of 311909478071 in words is "three hundred eleven billion, nine hundred nine million, four hundred seventy-eight thousand, seventy-one".