7165865865 has 16 divisors (see below), whose sum is σ = 12068827200. Its totient is φ = 3620647872.

The previous prime is 7165865851. The next prime is 7165865869. The reversal of 7165865865 is 5685685617.

It is not a de Polignac number, because 7165865865 - 2⁶ = 7165865801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (7165865869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12571410 + ... + 12571979.

It is an arithmetic number, because the mean of its divisors is an integer number (754301700).

Almost surely, 2^7165865865 is an apocalyptic number.

It is an amenable number.

7165865865 is a deficient number, since it is larger than the sum of its proper divisors (4902961335).

7165865865 is a wasteful number, since it uses less digits than its factorization.

7165865865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25143416.

The product of its digits is 12096000, while the sum is 57.

The square root of 7165865865 is about 84651.4374656450. The cubic root of 7165865865 is about 1927.9224393345.

The spelling of 7165865865 in words is "seven billion, one hundred sixty-five million, eight hundred sixty-five thousand, eight hundred sixty-five".