78429083618550 has 48 divisors (see below), whose sum is σ = 222290431287552. Its totient is φ = 17926647684000.

The previous prime is 78429083618539. The next prime is 78429083618563. The reversal of 78429083618550 is 5581638092487.

It is a super-2 number, since 2×78429083618550² (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, 37347181626 + ... + 37347183725.

It is an arithmetic number, because the mean of its divisors is an integer number (4631050651824).

It is a 1-persistent number, because it is pandigital, but 2⋅78429083618550 = 156858167237100 is not.

Almost surely, 2^{78429083618550} is an apocalyptic number.

78429083618550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78429083618550 is an abundant number, since it is smaller than the sum of its proper divisors (143861347669002).

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

78429083618550 is a wasteful number, since it uses less digits than its factorization.

78429083618550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74694365373 (or 74694365368 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 66.

The spelling of 78429083618550 in words is "seventy-eight trillion, four hundred twenty-nine billion, eighty-three million, six hundred eighteen thousand, five hundred fifty".