84787961856 has 448 divisors, whose sum is σ = 262771786368. Its totient is φ = 24083693568.

The previous prime is 84787961837. The next prime is 84787961861. The reversal of 84787961856 is 65816978748.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363896716 + ... + 363896948.

It is an arithmetic number, because the mean of its divisors is an integer number (586544166).

Almost surely, 2^84787961856 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 84787961856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131385893184).

84787961856 is an abundant number, since it is smaller than the sum of its proper divisors (177983824512).

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

84787961856 is a wasteful number, since it uses less digits than its factorization.

84787961856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 335 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 69.

The spelling of 84787961856 in words is "eighty-four billion, seven hundred eighty-seven million, nine hundred sixty-one thousand, eight hundred fifty-six".