84078849685290 has 256 divisors, whose sum is σ = 230174146658304. Its totient is φ = 19530694656000.

The previous prime is 84078849685289. The next prime is 84078849685331. The reversal of 84078849685290 is 9258694887048.

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, 3491199589 + ... + 3491223671.

It is an arithmetic number, because the mean of its divisors is an integer number (899117760384).

Almost surely, 2^{84078849685290} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84078849685290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115087073329152).

84078849685290 is an abundant number, since it is smaller than the sum of its proper divisors (146095296973014).

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

84078849685290 is a wasteful number, since it uses less digits than its factorization.

84078849685290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33765.

The product of its (nonzero) digits is 2229534720, while the sum is 78.

The spelling of 84078849685290 in words is "eighty-four trillion, seventy-eight billion, eight hundred forty-nine million, six hundred eighty-five thousand, two hundred ninety".