7865000822991 has 16 divisors (see below), whose sum is σ = 11295681207776. Its totient is φ = 4838994781056.

The previous prime is 7865000822929. The next prime is 7865000823013. The reversal of 7865000822991 is 1992280005687.

It is a happy number.

It is not a de Polignac number, because 7865000822991 - 2⁷ = 7865000822863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7865000822911) 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, 20762500 + ... + 21137913.

It is an arithmetic number, because the mean of its divisors is an integer number (705980075486).

Almost surely, 2^{7865000822991} is an apocalyptic number.

7865000822991 is a deficient number, since it is larger than the sum of its proper divisors (3430680384785).

7865000822991 is a wasteful number, since it uses less digits than its factorization.

7865000822991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41905242.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 7865000822991 in words is "seven trillion, eight hundred sixty-five billion, eight hundred twenty-two thousand, nine hundred ninety-one".