2158430289881 has 16 divisors (see below), whose sum is σ = 2192773939200. Its totient is φ = 2124318755328.

The previous prime is 2158430289809. The next prime is 2158430289901. The reversal of 2158430289881 is 1889820348512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2158430289881 - 2¹⁰ = 2158430288857 is a prime.

It is a super-2 number, since 2×2158430289881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2158430289881.

It is not an unprimeable number, because it can be changed into a prime (2158430285881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51391016 + ... + 51432998.

It is an arithmetic number, because the mean of its divisors is an integer number (137048371200).

Almost surely, 2^{2158430289881} is an apocalyptic number.

It is an amenable number.

2158430289881 is a deficient number, since it is larger than the sum of its proper divisors (34343649319).

2158430289881 is a wasteful number, since it uses less digits than its factorization.

2158430289881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44728.

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 2158430289881 in words is "two trillion, one hundred fifty-eight billion, four hundred thirty million, two hundred eighty-nine thousand, eight hundred eighty-one".