7844540525868 has 24 divisors (see below), whose sum is σ = 18304727101360. Its totient is φ = 2614732669440.

The previous prime is 7844540525863. The next prime is 7844540525891. The reversal of 7844540525868 is 8685250454487.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7844540525799 and 7844540525808.

It is not an unprimeable number, because it can be changed into a prime (7844540525863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13985053 + ... + 14535156.

Almost surely, 2^{7844540525868} is an apocalyptic number.

It is an amenable number.

7844540525868 is an abundant number, since it is smaller than the sum of its proper divisors (10460186575492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7844540525868 is a wasteful number, since it uses less digits than its factorization.

7844540525868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28543137 (or 28543135 counting only the distinct ones).

The product of its (nonzero) digits is 344064000, while the sum is 66.

The spelling of 7844540525868 in words is "seven trillion, eight hundred forty-four billion, five hundred forty million, five hundred twenty-five thousand, eight hundred sixty-eight".