869955280000 has 640 divisors, whose sum is σ = 2441672164800. Its totient is φ = 306708480000.

The previous prime is 869955279971. The next prime is 869955280043. The reversal of 869955280000 is 82559968.

It is a tau number, because it is divible by the number of its divisors (640).

It is a self number, because there is not a number n which added to its sum of digits gives 869955280000.

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, 3385039872 + ... + 3385040128.

Almost surely, 2^869955280000 is an apocalyptic number.

869955280000 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 869955280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220836082400).

869955280000 is an abundant number, since it is smaller than the sum of its proper divisors (1571716884800).

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

869955280000 is a wasteful number, since it uses less digits than its factorization.

869955280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 869955280000 in words is "eight hundred sixty-nine billion, nine hundred fifty-five million, two hundred eighty thousand".