869821475094 has 384 divisors, whose sum is σ = 2296751708160. Its totient is φ = 234443980800.

The previous prime is 869821475093. The next prime is 869821475189. The reversal of 869821475094 is 490574128968.

869821475094 is a `hidden beast` number, since 8 + 6 + 9 + 82 + 1 + 47 + 509 + 4 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869821475093) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2018147059 + ... + 2018147489.

It is an arithmetic number, because the mean of its divisors is an integer number (5981124240).

Almost surely, 2^869821475094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869821475094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1148375854080).

869821475094 is an abundant number, since it is smaller than the sum of its proper divisors (1426930233066).

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

869821475094 is a wasteful number, since it uses less digits than its factorization.

869821475094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 869821475094 in words is "eight hundred sixty-nine billion, eight hundred twenty-one million, four hundred seventy-five thousand, ninety-four".