2158133942881 has 32 divisors (see below), whose sum is σ = 2564489281536. Its totient is φ = 1777828176000.

The previous prime is 2158133942831. The next prime is 2158133942891. The reversal of 2158133942881 is 1882493318512.

It is a cyclic number.

It is not a de Polignac number, because 2158133942881 - 2⁹ = 2158133942369 is a prime.

It is a super-2 number, since 2×2158133942881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2158133942801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5455036 + ... + 5837266.

It is an arithmetic number, because the mean of its divisors is an integer number (80140290048).

Almost surely, 2^{2158133942881} is an apocalyptic number.

It is an amenable number.

2158133942881 is a deficient number, since it is larger than the sum of its proper divisors (406355338655).

2158133942881 is a wasteful number, since it uses less digits than its factorization.

2158133942881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382573.

The product of its digits is 3317760, while the sum is 55.

The spelling of 2158133942881 in words is "two trillion, one hundred fifty-eight billion, one hundred thirty-three million, nine hundred forty-two thousand, eight hundred eighty-one".