7142865007865 has 4 divisors (see below), whose sum is σ = 8571438009444. Its totient is φ = 5714292006288.

The previous prime is 7142865007793. The next prime is 7142865007981. The reversal of 7142865007865 is 5687005682417.

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 5168761327081 + 1974103680784 = 2273491^2 + 1405028^2 .

It is a cyclic number.

It is not a de Polignac number, because 7142865007865 - 2⁸ = 7142865007609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714286500782 + ... + 714286500791.

It is an arithmetic number, because the mean of its divisors is an integer number (2142859502361).

Almost surely, 2^{7142865007865} is an apocalyptic number.

It is an amenable number.

7142865007865 is a deficient number, since it is larger than the sum of its proper divisors (1428573001579).

7142865007865 is a wasteful number, since it uses less digits than its factorization.

7142865007865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428573001578.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 7142865007865 in words is "seven trillion, one hundred forty-two billion, eight hundred sixty-five million, seven thousand, eight hundred sixty-five".