2158217676563 has 8 divisors (see below), whose sum is σ = 2324268318288. Its totient is φ = 1992171877344.

The previous prime is 2158217676529. The next prime is 2158217676613. The reversal of 2158217676563 is 3656767128512.

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 2158217676563 - 2²² = 2158213482259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2158217676163) 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, 257156 + ... + 2093457.

It is an arithmetic number, because the mean of its divisors is an integer number (290533539786).

Almost surely, 2^{2158217676563} is an apocalyptic number.

2158217676563 is a deficient number, since it is larger than the sum of its proper divisors (166050641725).

2158217676563 is a wasteful number, since it uses less digits than its factorization.

2158217676563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421253.

The product of its digits is 25401600, while the sum is 59.

The spelling of 2158217676563 in words is "two trillion, one hundred fifty-eight billion, two hundred seventeen million, six hundred seventy-six thousand, five hundred sixty-three".