7687195057 has 4 divisors (see below), whose sum is σ = 7689614836. Its totient is φ = 7684775280.

The previous prime is 7687195049. The next prime is 7687195067. The reversal of 7687195057 is 7505917867.

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 2 ways, for example, as 4697183296 + 2990011761 = 68536^2 + 54681^2 .

It is a cyclic number.

It is not a de Polignac number, because 7687195057 - 2³ = 7687195049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7687194989 and 7687195007.

It is not an unprimeable number, because it can be changed into a prime (7687195007) 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, 1205118 + ... + 1211479.

It is an arithmetic number, because the mean of its divisors is an integer number (1922403709).

Almost surely, 2^7687195057 is an apocalyptic number.

It is an amenable number.

7687195057 is a deficient number, since it is larger than the sum of its proper divisors (2419779).

7687195057 is a wasteful number, since it uses less digits than its factorization.

7687195057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419778.

The product of its (nonzero) digits is 3704400, while the sum is 55.

The square root of 7687195057 is about 87676.6505804139. The cubic root of 7687195057 is about 1973.5855968939.

The spelling of 7687195057 in words is "seven billion, six hundred eighty-seven million, one hundred ninety-five thousand, fifty-seven".