2158487638833 has 4 divisors (see below), whose sum is σ = 2877983518448. Its totient is φ = 1438991759220.

The previous prime is 2158487638829. The next prime is 2158487638837. The reversal of 2158487638833 is 3388367848512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2158487638829) and next prime (2158487638837).

It is not a de Polignac number, because 2158487638833 - 2² = 2158487638829 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2158487638837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359747939803 + ... + 359747939808.

It is an arithmetic number, because the mean of its divisors is an integer number (719495879612).

Almost surely, 2^{2158487638833} is an apocalyptic number.

It is an amenable number.

2158487638833 is a deficient number, since it is larger than the sum of its proper divisors (719495879615).

2158487638833 is an equidigital number, since it uses as much as digits as its factorization.

2158487638833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719495879614.

The product of its digits is 185794560, while the sum is 66.

The spelling of 2158487638833 in words is "two trillion, one hundred fifty-eight billion, four hundred eighty-seven million, six hundred thirty-eight thousand, eight hundred thirty-three".