84109420555776 has 800 divisors, whose sum is σ = 326599080749568. Its totient is φ = 20896732200960.

The previous prime is 84109420555757. The next prime is 84109420555813. The reversal of 84109420555776 is 67755502490148.

It is a happy number.

84109420555776 is a `hidden beast` number, since 8 + 4 + 1 + 0 + 9 + 4 + 2 + 0 + 5 + 557 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 72874326 + ... + 74019498.

Almost surely, 2^{84109420555776} 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 84109420555776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163299540374784).

84109420555776 is an abundant number, since it is smaller than the sum of its proper divisors (242489660193792).

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

84109420555776 is a wasteful number, since it uses less digits than its factorization.

84109420555776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145244 (or 1145219 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 84109420555776 in words is "eighty-four trillion, one hundred nine billion, four hundred twenty million, five hundred fifty-five thousand, seven hundred seventy-six".