2158823725533 has 8 divisors (see below), whose sum is σ = 3198257371200. Its totient is φ = 1439215817004.

The previous prime is 2158823725511. The next prime is 2158823725537. The reversal of 2158823725533 is 3355273288512.

2158823725533 is a `hidden beast` number, since 2 + 1 + 5 + 8 + 82 + 3 + 7 + 2 + 553 + 3 = 666.

It is not a de Polignac number, because 2158823725533 - 2⁹ = 2158823725021 is a prime.

It is a super-2 number, since 2×2158823725533² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2158823725533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158823725537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39978217113 + ... + 39978217166.

It is an arithmetic number, because the mean of its divisors is an integer number (399782171400).

Almost surely, 2^{2158823725533} is an apocalyptic number.

It is an amenable number.

2158823725533 is a deficient number, since it is larger than the sum of its proper divisors (1039433645667).

2158823725533 is an equidigital number, since it uses as much as digits as its factorization.

2158823725533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79956434288 (or 79956434282 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 2158823725533 in words is "two trillion, one hundred fifty-eight billion, eight hundred twenty-three million, seven hundred twenty-five thousand, five hundred thirty-three".