78168010121500 has 192 divisors, whose sum is σ = 191676366161280. Its totient is φ = 27658916812800.

The previous prime is 78168010121431. The next prime is 78168010121521. The reversal of 78168010121500 is 512101086187.

It is a super-2 number, since 2×78168010121500² (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 63 ways as a sum of consecutive naturals, for example, 12175096 + ... + 17451904.

It is an arithmetic number, because the mean of its divisors is an integer number (998314407090).

Almost surely, 2^{78168010121500} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78168010121500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95838183080640).

78168010121500 is an abundant number, since it is smaller than the sum of its proper divisors (113508356039780).

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

78168010121500 is a wasteful number, since it uses less digits than its factorization.

78168010121500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276937 (or 5276925 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 40.

The spelling of 78168010121500 in words is "seventy-eight trillion, one hundred sixty-eight billion, ten million, one hundred twenty-one thousand, five hundred".