7857865065 has 16 divisors (see below), whose sum is σ = 12809803968. Its totient is φ = 4111788096.

The previous prime is 7857865063. The next prime is 7857865087. The reversal of 7857865065 is 5605687587.

It is not a de Polignac number, because 7857865065 - 2¹ = 7857865063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7857864996 and 7857865014.

It is not an unprimeable number, because it can be changed into a prime (7857865063) 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, 4941259 + ... + 4942848.

It is an arithmetic number, because the mean of its divisors is an integer number (800612748).

Almost surely, 2^7857865065 is an apocalyptic number.

It is an amenable number.

7857865065 is a deficient number, since it is larger than the sum of its proper divisors (4951938903).

7857865065 is a wasteful number, since it uses less digits than its factorization.

7857865065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9884168.

The product of its (nonzero) digits is 14112000, while the sum is 57.

The square root of 7857865065 is about 88644.5997509155. The cubic root of 7857865065 is about 1988.0845743762.

The spelling of 7857865065 in words is "seven billion, eight hundred fifty-seven million, eight hundred sixty-five thousand, sixty-five".