7896640194 has 12 divisors (see below), whose sum is σ = 17109387126. Its totient is φ = 2632213392.

The previous prime is 7896640177. The next prime is 7896640207. The reversal of 7896640194 is 4910466987.

It can be written as a sum of positive squares in only one way, i.e., 7379669025 + 516971169 = 85905^2 + 22737^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7896640194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219351099 + ... + 219351134.

Almost surely, 2^7896640194 is an apocalyptic number.

7896640194 is an abundant number, since it is smaller than the sum of its proper divisors (9212746932).

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

7896640194 is a wasteful number, since it uses less digits than its factorization.

7896640194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438702241 (or 438702238 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 7896640194 is about 88863.0417777830. The cubic root of 7896640194 is about 1991.3493196453.

The spelling of 7896640194 in words is "seven billion, eight hundred ninety-six million, six hundred forty thousand, one hundred ninety-four".