78550728376320 has 2856 divisors, whose sum is σ = 323429721672096. Its totient is φ = 18207272337408.

The previous prime is 78550728376261. The next prime is 78550728376339. The reversal of 78550728376320 is 2367382705587.

78550728376320 is a `hidden beast` number, since 7 + 8 + 5 + 507 + 28 + 3 + 76 + 32 + 0 = 666.

It is a super-4 number, since 4×78550728376320⁴ (a number of 57 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 2708645806066 + ... + 2708645806094.

Almost surely, 2^{78550728376320} 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 78550728376320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161714860836048).

78550728376320 is an abundant number, since it is smaller than the sum of its proper divisors (244878993295776).

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

78550728376320 is an frugal number, since it uses more digits than its factorization.

78550728376320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 118540800, while the sum is 63.

The spelling of 78550728376320 in words is "seventy-eight trillion, five hundred fifty billion, seven hundred twenty-eight million, three hundred seventy-six thousand, three hundred twenty".