78113308500 has 384 divisors, whose sum is σ = 274869504000. Its totient is φ = 19072972800.

The previous prime is 78113308487. The next prime is 78113308519. The reversal of 78113308500 is 580331187.

78113308500 is a `hidden beast` number, since 7 + 8 + 113 + 30 + 8 + 500 = 666.

It is a super-2 number, since 2×78113308500² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8486901 + ... + 8496099.

It is an arithmetic number, because the mean of its divisors is an integer number (715806000).

Almost surely, 2^78113308500 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 78113308500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137434752000).

78113308500 is an abundant number, since it is smaller than the sum of its proper divisors (196756195500).

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

78113308500 is a wasteful number, since it uses less digits than its factorization.

78113308500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281 (or 9263 counting only the distinct ones).

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

Adding to 78113308500 its reverse (580331187), we get a palindrome (78693639687).

The spelling of 78113308500 in words is "seventy-eight billion, one hundred thirteen million, three hundred eight thousand, five hundred".