7945676861 has 4 divisors (see below), whose sum is σ = 8363870400. Its totient is φ = 7527483324.

The previous prime is 7945676857. The next prime is 7945676863. The reversal of 7945676861 is 1686765497.

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 7945676861 - 2² = 7945676857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7945676861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7945676863) 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, 209096741 + ... + 209096778.

It is an arithmetic number, because the mean of its divisors is an integer number (2090967600).

Almost surely, 2^7945676861 is an apocalyptic number.

It is an amenable number.

7945676861 is a deficient number, since it is larger than the sum of its proper divisors (418193539).

7945676861 is a wasteful number, since it uses less digits than its factorization.

7945676861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418193538.

The product of its digits is 15240960, while the sum is 59.

The square root of 7945676861 is about 89138.5262442677. The cubic root of 7945676861 is about 1995.4627863800.

The spelling of 7945676861 in words is "seven billion, nine hundred forty-five million, six hundred seventy-six thousand, eight hundred sixty-one".