8158217955 has 16 divisors (see below), whose sum is σ = 13068053664. Its totient is φ = 4346081280.

The previous prime is 8158217933. The next prime is 8158217981. The reversal of 8158217955 is 5597128518.

It is not a de Polignac number, because 8158217955 - 2¹⁰ = 8158216931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8158217898 and 8158217907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296926 + ... + 323235.

It is an arithmetic number, because the mean of its divisors is an integer number (816753354).

Almost surely, 2^8158217955 is an apocalyptic number.

8158217955 is a deficient number, since it is larger than the sum of its proper divisors (4909835709).

8158217955 is a wasteful number, since it uses less digits than its factorization.

8158217955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621046.

The product of its digits is 1008000, while the sum is 51.

The square root of 8158217955 is about 90322.8540016313. The cubic root of 8158217955 is about 2013.0988523255.

The spelling of 8158217955 in words is "eight billion, one hundred fifty-eight million, two hundred seventeen thousand, nine hundred fifty-five".