78904825021440 has 616 divisors, whose sum is σ = 309587996498688. Its totient is φ = 19128432476160.

The previous prime is 78904825021439. The next prime is 78904825021457. The reversal of 78904825021440 is 4412052840987.

78904825021440 is a `hidden beast` number, since 7 + 8 + 9 + 0 + 4 + 82 + 502 + 14 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 40096369 + ... + 42018191.

Almost surely, 2^{78904825021440} 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 78904825021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154793998249344).

78904825021440 is an abundant number, since it is smaller than the sum of its proper divisors (230683171477248).

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

78904825021440 is a wasteful number, since it uses less digits than its factorization.

78904825021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921877 (or 1921844 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 78904825021440 in words is "seventy-eight trillion, nine hundred four billion, eight hundred twenty-five million, twenty-one thousand, four hundred forty".