2328556322781 has 24 divisors (see below), whose sum is σ = 3622316277216. Its totient is φ = 1432911232800.

The previous prime is 2328556322761. The next prime is 2328556322783. The reversal of 2328556322781 is 1872236558232.

2328556322781 is a `hidden beast` number, since 2 + 3 + 2 + 8 + 5 + 563 + 2 + 2 + 78 + 1 = 666.

It is not a de Polignac number, because 2328556322781 - 2⁵ = 2328556322749 is a prime.

It is a super-2 number, since 2×2328556322781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2328556322783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3489106 + ... + 4102556.

It is an arithmetic number, because the mean of its divisors is an integer number (150929844884).

Almost surely, 2^{2328556322781} is an apocalyptic number.

It is an amenable number.

2328556322781 is a deficient number, since it is larger than the sum of its proper divisors (1293759954435).

2328556322781 is a wasteful number, since it uses less digits than its factorization.

2328556322781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645913 (or 645910 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 2328556322781 in words is "two trillion, three hundred twenty-eight billion, five hundred fifty-six million, three hundred twenty-two thousand, seven hundred eighty-one".