2158423549158 has 16 divisors (see below), whose sum is σ = 4316861941056. Its totient is φ = 719472042600.

The previous prime is 2158423549157. The next prime is 2158423549171. The reversal of 2158423549158 is 8519453248512.

It is a junction number, because it is equal to n+sod(n) for n = 2158423549098 and 2158423549107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158423549157) 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, 2421285 + ... + 3190527.

It is an arithmetic number, because the mean of its divisors is an integer number (269803871316).

Almost surely, 2^{2158423549158} is an apocalyptic number.

2158423549158 is an abundant number, since it is smaller than the sum of its proper divisors (2158438391898).

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

2158423549158 is a wasteful number, since it uses less digits than its factorization.

2158423549158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236899.

The product of its digits is 13824000, while the sum is 57.

The spelling of 2158423549158 in words is "two trillion, one hundred fifty-eight billion, four hundred twenty-three million, five hundred forty-nine thousand, one hundred fifty-eight".