881209451628 has 144 divisors (see below), whose sum is σ = 2441487484800. Its totient is φ = 265772640000.

The previous prime is 881209451611. The next prime is 881209451641. The reversal of 881209451628 is 826154902188.

881209451628 is a `hidden beast` number, since 8 + 8 + 1 + 2 + 0 + 9 + 4 + 5 + 1 + 628 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189545848 + ... + 189550496.

It is an arithmetic number, because the mean of its divisors is an integer number (16954774200).

Almost surely, 2^881209451628 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 881209451628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220743742400).

881209451628 is an abundant number, since it is smaller than the sum of its proper divisors (1560278033172).

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

881209451628 is a wasteful number, since it uses less digits than its factorization.

881209451628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6828 (or 6823 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 881209451628 in words is "eight hundred eighty-one billion, two hundred nine million, four hundred fifty-one thousand, six hundred twenty-eight".