8161756195 has 16 divisors (see below), whose sum is σ = 10230172992. Its totient is φ = 6239263360.

The previous prime is 8161756193. The next prime is 8161756217. The reversal of 8161756195 is 5916571618.

It is a happy number.

It is not a de Polignac number, because 8161756195 - 2¹ = 8161756193 is a prime.

It is a super-2 number, since 2×8161756195² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8161756193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81465 + ... + 151525.

It is an arithmetic number, because the mean of its divisors is an integer number (639385812).

Almost surely, 2^8161756195 is an apocalyptic number.

8161756195 is a deficient number, since it is larger than the sum of its proper divisors (2068416797).

8161756195 is a wasteful number, since it uses less digits than its factorization.

8161756195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71102.

The product of its digits is 453600, while the sum is 49.

The square root of 8161756195 is about 90342.4385048356. The cubic root of 8161756195 is about 2013.3898389700.

The spelling of 8161756195 in words is "eight billion, one hundred sixty-one million, seven hundred fifty-six thousand, one hundred ninety-five".