7861880197 has 16 divisors (see below), whose sum is σ = 8557322112. Its totient is φ = 7195184640.

The previous prime is 7861880179. The next prime is 7861880207. The reversal of 7861880197 is 7910881687.

It is a happy number.

7861880197 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7861880197 - 2²⁷ = 7727662469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7861880107) 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, 43498 + ... + 132724.

It is an arithmetic number, because the mean of its divisors is an integer number (534832632).

Almost surely, 2^7861880197 is an apocalyptic number.

It is an amenable number.

7861880197 is a deficient number, since it is larger than the sum of its proper divisors (695441915).

7861880197 is a wasteful number, since it uses less digits than its factorization.

7861880197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89388.

The product of its (nonzero) digits is 1354752, while the sum is 55.

The square root of 7861880197 is about 88667.2442167907. The cubic root of 7861880197 is about 1988.4231337991.

The spelling of 7861880197 in words is "seven billion, eight hundred sixty-one million, eight hundred eighty thousand, one hundred ninety-seven".