7809870961 has 4 divisors (see below), whose sum is σ = 8149430592. Its totient is φ = 7470311332.

The previous prime is 7809870953. The next prime is 7809871031. The reversal of 7809870961 is 1690789087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7809870961 - 2³ = 7809870953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7809876961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169779781 + ... + 169779826.

It is an arithmetic number, because the mean of its divisors is an integer number (2037357648).

Almost surely, 2^7809870961 is an apocalyptic number.

It is an amenable number.

7809870961 is a deficient number, since it is larger than the sum of its proper divisors (339559631).

7809870961 is a wasteful number, since it uses less digits than its factorization.

7809870961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339559630.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The square root of 7809870961 is about 88373.4743064909. The cubic root of 7809870961 is about 1984.0287118938.

The spelling of 7809870961 in words is "seven billion, eight hundred nine million, eight hundred seventy thousand, nine hundred sixty-one".