7864372865 has 16 divisors (see below), whose sum is σ = 9986270976. Its totient is φ = 5933188800.

The previous prime is 7864372861. The next prime is 7864372877. The reversal of 7864372865 is 5682734687.

It is not a de Polignac number, because 7864372865 - 2² = 7864372861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7864372865.

It is not an unprimeable number, because it can be changed into a prime (7864372861) 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, 473426 + ... + 489755.

It is an arithmetic number, because the mean of its divisors is an integer number (624141936).

Almost surely, 2^7864372865 is an apocalyptic number.

It is an amenable number.

7864372865 is a deficient number, since it is larger than the sum of its proper divisors (2121898111).

7864372865 is a wasteful number, since it uses less digits than its factorization.

7864372865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963280.

The product of its digits is 13547520, while the sum is 56.

The square root of 7864372865 is about 88681.2994097403. The cubic root of 7864372865 is about 1988.6332597425.

The spelling of 7864372865 in words is "seven billion, eight hundred sixty-four million, three hundred seventy-two thousand, eight hundred sixty-five".