78020020915200 has 4752 divisors, whose sum is σ = 378234524566080. Its totient is φ = 15183626895360.

The previous prime is 78020020915147. The next prime is 78020020915219. The reversal of 78020020915200 is 251902002087.

78020020915200 is a `hidden beast` number, since 7 + 8 + 0 + 20 + 0 + 20 + 91 + 520 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 97892121202 + ... + 97892121998.

Almost surely, 2^{78020020915200} is an apocalyptic number.

78020020915200 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78020020915200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189117262283040).

78020020915200 is an abundant number, since it is smaller than the sum of its proper divisors (300214503650880).

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

78020020915200 is a wasteful number, since it uses less digits than its factorization.

78020020915200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 78020020915200 its reverse (251902002087), we get a palindrome (78271922917287).

The spelling of 78020020915200 in words is "seventy-eight trillion, twenty billion, twenty million, nine hundred fifteen thousand, two hundred".