869141264640 has 576 divisors, whose sum is σ = 3085583155200. Its totient is φ = 206740684800.

The previous prime is 869141264611. The next prime is 869141264689. The reversal of 869141264640 is 46462141968.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 603989041 + ... + 603990479.

It is an arithmetic number, because the mean of its divisors is an integer number (5356915200).

Almost surely, 2^869141264640 is an apocalyptic number.

869141264640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869141264640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1542791577600).

869141264640 is an abundant number, since it is smaller than the sum of its proper divisors (2216441890560).

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

869141264640 is a wasteful number, since it uses less digits than its factorization.

869141264640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 869141264640 in words is "eight hundred sixty-nine billion, one hundred forty-one million, two hundred sixty-four thousand, six hundred forty".