78615469400 has 96 divisors (see below), whose sum is σ = 198163098000. Its totient is φ = 28832294400.

The previous prime is 78615469399. The next prime is 78615469417. The reversal of 78615469400 is 496451687.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285935 + ... + 488865.

Almost surely, 2^78615469400 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 78615469400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99081549000).

78615469400 is an abundant number, since it is smaller than the sum of its proper divisors (119547628600).

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

78615469400 is a wasteful number, since it uses less digits than its factorization.

78615469400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203109 (or 203100 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 78615469400 in words is "seventy-eight billion, six hundred fifteen million, four hundred sixty-nine thousand, four hundred".