2311991748968 has 32 divisors (see below), whose sum is σ = 4839052505760. Its totient is φ = 1026465679680.

The previous prime is 2311991748917. The next prime is 2311991748973. The reversal of 2311991748968 is 8698471991132.

It is a super-2 number, since 2×2311991748968² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2311991748898 and 2311991748907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305491955 + ... + 305499522.

It is an arithmetic number, because the mean of its divisors is an integer number (151220390805).

Almost surely, 2^{2311991748968} is an apocalyptic number.

It is an amenable number.

2311991748968 is an abundant number, since it is smaller than the sum of its proper divisors (2527060756792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2311991748968 is a wasteful number, since it uses less digits than its factorization.

2311991748968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610991537 (or 610991533 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 68.

The spelling of 2311991748968 in words is "two trillion, three hundred eleven billion, nine hundred ninety-one million, seven hundred forty-eight thousand, nine hundred sixty-eight".