78821542068524 has 12 divisors (see below), whose sum is σ = 137937920371104. Its totient is φ = 39410707676784.

The previous prime is 78821542068473. The next prime is 78821542068583. The reversal of 78821542068524 is 42586024512887.

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, 12982964 + ... + 18061019.

It is an arithmetic number, because the mean of its divisors is an integer number (11494826697592).

Almost surely, 2^{78821542068524} is an apocalyptic number.

It is an amenable number.

78821542068524 is a deficient number, since it is larger than the sum of its proper divisors (59116378302580).

78821542068524 is a wasteful number, since it uses less digits than its factorization.

78821542068524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31678744 (or 31678742 counting only the distinct ones).

The product of its (nonzero) digits is 68812800, while the sum is 62.

The spelling of 78821542068524 in words is "seventy-eight trillion, eight hundred twenty-one billion, five hundred forty-two million, sixty-eight thousand, five hundred twenty-four".