78504644861500 has 384 divisors, whose sum is σ = 203611292172288. Its totient is φ = 26066160000000.

The previous prime is 78504644861453. The next prime is 78504644861563. The reversal of 78504644861500 is 516844640587.

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, 8889662085 + ... + 8889670915.

It is an arithmetic number, because the mean of its divisors is an integer number (530237740032).

Almost surely, 2^{78504644861500} 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 78504644861500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101805646086144).

78504644861500 is an abundant number, since it is smaller than the sum of its proper divisors (125106647310788).

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

78504644861500 is a wasteful number, since it uses less digits than its factorization.

78504644861500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10206 (or 10194 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 58.

The spelling of 78504644861500 in words is "seventy-eight trillion, five hundred four billion, six hundred forty-four million, eight hundred sixty-one thousand, five hundred".