78218823520146 has 16 divisors (see below), whose sum is σ = 156443622133824. Its totient is φ = 26071945324464.

The previous prime is 78218823520139. The next prime is 78218823520171. The reversal of 78218823520146 is 64102532881287.

It is a super-2 number, since 2×78218823520146² (a number of 29 digits) contains 22 as substring.

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, 248792041 + ... + 249106236.

It is an arithmetic number, because the mean of its divisors is an integer number (9777726383364).

Almost surely, 2^{78218823520146} is an apocalyptic number.

78218823520146 is an abundant number, since it is smaller than the sum of its proper divisors (78224798613678).

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

78218823520146 is a wasteful number, since it uses less digits than its factorization.

78218823520146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497924465.

The product of its (nonzero) digits is 10321920, while the sum is 57.

The spelling of 78218823520146 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred twenty-three million, five hundred twenty thousand, one hundred forty-six".