8161774308 has 18 divisors (see below), whose sum is σ = 20631151814. Its totient is φ = 2720591424.

The previous prime is 8161774261. The next prime is 8161774337. The reversal of 8161774308 is 8034771618.

It can be written as a sum of positive squares in only one way, i.e., 8161676964 + 97344 = 90342^2 + 312^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×8161774308² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113357941 + ... + 113358012.

Almost surely, 2^8161774308 is an apocalyptic number.

It is an amenable number.

8161774308 is an abundant number, since it is smaller than the sum of its proper divisors (12469377506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8161774308 is a wasteful number, since it uses less digits than its factorization.

8161774308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226715963 (or 226715958 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 8161774308 is about 90342.5387511332. The cubic root of 8161774308 is about 2013.3913283758.

The spelling of 8161774308 in words is "eight billion, one hundred sixty-one million, seven hundred seventy-four thousand, three hundred eight".