7844260864065 has 32 divisors (see below), whose sum is σ = 12602057521536. Its totient is φ = 4166529024000.

The previous prime is 7844260864061. The next prime is 7844260864207. The reversal of 7844260864065 is 5604680624487.

It is a happy number.

It is not a de Polignac number, because 7844260864065 - 2² = 7844260864061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7844260864061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40388167 + ... + 40581923.

It is an arithmetic number, because the mean of its divisors is an integer number (393814297548).

Almost surely, 2^{7844260864065} is an apocalyptic number.

It is an amenable number.

7844260864065 is a deficient number, since it is larger than the sum of its proper divisors (4757796657471).

7844260864065 is a wasteful number, since it uses less digits than its factorization.

7844260864065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204769.

The product of its (nonzero) digits is 61931520, while the sum is 60.

The spelling of 7844260864065 in words is "seven trillion, eight hundred forty-four billion, two hundred sixty million, eight hundred sixty-four thousand, sixty-five".