8161653970 has 8 divisors (see below), whose sum is σ = 14690977164. Its totient is φ = 3264661584.

The previous prime is 8161653961. The next prime is 8161653989. The reversal of 8161653970 is 793561618.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6704170641 + 1457483329 = 81879^2 + 38177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8161653970² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8161653970.

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 3 ways as a sum of consecutive naturals, for example, 408082689 + ... + 408082708.

Almost surely, 2^8161653970 is an apocalyptic number.

8161653970 is a deficient number, since it is larger than the sum of its proper divisors (6529323194).

8161653970 is a wasteful number, since it uses less digits than its factorization.

8161653970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816165404.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 8161653970 is about 90341.8727390572. The cubic root of 8161653970 is about 2013.3814331142.

The spelling of 8161653970 in words is "eight billion, one hundred sixty-one million, six hundred fifty-three thousand, nine hundred seventy".