78242553622486 has 48 divisors (see below), whose sum is σ = 129084981820704. Its totient is φ = 35542262448000.

The previous prime is 78242553622469. The next prime is 78242553622531. The reversal of 78242553622486 is 68422635524287.

It is a happy number.

It is a super-2 number, since 2×78242553622486² (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 23 ways as a sum of consecutive naturals, for example, 3743115111 + ... + 3743136013.

It is an arithmetic number, because the mean of its divisors is an integer number (2689270454598).

Almost surely, 2^{78242553622486} is an apocalyptic number.

78242553622486 is a deficient number, since it is larger than the sum of its proper divisors (50842428198218).

78242553622486 is a wasteful number, since it uses less digits than its factorization.

78242553622486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29989 (or 29978 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 64.

The spelling of 78242553622486 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred fifty-three million, six hundred twenty-two thousand, four hundred eighty-six".