78242532785616 has 40 divisors (see below), whose sum is σ = 206827160314720. Its totient is φ = 25474312999296.

The previous prime is 78242532785587. The next prime is 78242532785621. The reversal of 78242532785616 is 61658723524287.

It is a happy number.

It is a super-2 number, since 2×78242532785616² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18954099871 + ... + 18954103998.

It is an arithmetic number, because the mean of its divisors is an integer number (5170679007868).

Almost surely, 2^{78242532785616} is an apocalyptic number.

It is an amenable number.

78242532785616 is an abundant number, since it is smaller than the sum of its proper divisors (128584627529104).

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

78242532785616 is a wasteful number, since it uses less digits than its factorization.

78242532785616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37908203923 (or 37908203917 counting only the distinct ones).

The product of its digits is 270950400, while the sum is 66.

The spelling of 78242532785616 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred thirty-two million, seven hundred eighty-five thousand, six hundred sixteen".