2316781309128 has 512 divisors, whose sum is σ = 7326851051520. Its totient is φ = 605351577600.

The previous prime is 2316781309123. The next prime is 2316781309133. The reversal of 2316781309128 is 8219031876132.

2316781309128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2316781309123) and next prime (2316781309133).

It is a super-2 number, since 2×2316781309128² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2316781309123) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 410701188 + ... + 410706828.

It is an arithmetic number, because the mean of its divisors is an integer number (14310255960).

Almost surely, 2^{2316781309128} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2316781309128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3663425525760).

2316781309128 is an abundant number, since it is smaller than the sum of its proper divisors (5010069742392).

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

2316781309128 is a wasteful number, since it uses less digits than its factorization.

2316781309128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762 (or 5736 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 2316781309128 in words is "two trillion, three hundred sixteen billion, seven hundred eighty-one million, three hundred nine thousand, one hundred twenty-eight".