8196693578 has 4 divisors (see below), whose sum is σ = 12295040370. Its totient is φ = 4098346788.

The previous prime is 8196693553. The next prime is 8196693611. The reversal of 8196693578 is 8753966918.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7729398889 + 467294689 = 87917^2 + 21617^2 .

It is a super-2 number, since 2×8196693578² (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 8196693578.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049173393 + ... + 2049173396.

Almost surely, 2^8196693578 is an apocalyptic number.

8196693578 is a deficient number, since it is larger than the sum of its proper divisors (4098346792).

8196693578 is a wasteful number, since it uses less digits than its factorization.

8196693578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098346791.

The product of its digits is 19595520, while the sum is 62.

The square root of 8196693578 is about 90535.5928792649. The cubic root of 8196693578 is about 2016.2586022732.

The spelling of 8196693578 in words is "eight billion, one hundred ninety-six million, six hundred ninety-three thousand, five hundred seventy-eight".