78850400000 has 108 divisors (see below), whose sum is σ = 196730392824. Its totient is φ = 31539840000.

The previous prime is 78850399997. The next prime is 78850400023. The reversal of 78850400000 is 405887.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 78850400000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 750719 + ... + 849281.

Almost surely, 2^78850400000 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 78850400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98365196412).

78850400000 is an abundant number, since it is smaller than the sum of its proper divisors (117879992824).

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

78850400000 is an frugal number, since it uses more digits than its factorization.

78850400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98604 (or 98570 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

Adding to 78850400000 its reverse (405887), we get a palindrome (78850805887).

The spelling of 78850400000 in words is "seventy-eight billion, eight hundred fifty million, four hundred thousand".