2158941848981 has 8 divisors (see below), whose sum is σ = 2228665953024. Its totient is φ = 2089222796160.

The previous prime is 2158941848923. The next prime is 2158941849037. The reversal of 2158941848981 is 1898481498512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2158941848981 - 2²² = 2158937654677 is a prime.

It is a super-2 number, since 2×2158941848981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158941848081) 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, 384476 + ... + 2113221.

It is an arithmetic number, because the mean of its divisors is an integer number (278583244128).

Almost surely, 2^{2158941848981} is an apocalyptic number.

It is an amenable number.

2158941848981 is a deficient number, since it is larger than the sum of its proper divisors (69724104043).

2158941848981 is a wasteful number, since it uses less digits than its factorization.

2158941848981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525611.

The product of its digits is 53084160, while the sum is 68.

The spelling of 2158941848981 in words is "two trillion, one hundred fifty-eight billion, nine hundred forty-one million, eight hundred forty-eight thousand, nine hundred eighty-one".