881261505504 has 144 divisors (see below), whose sum is σ = 2593223352720. Its totient is φ = 283545722880.

The previous prime is 881261505503. The next prime is 881261505511. The reversal of 881261505504 is 405505162188.

881261505504 is a `hidden beast` number, since 8 + 8 + 126 + 15 + 0 + 5 + 504 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 881261505504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881261505503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35157744 + ... + 35182800.

It is an arithmetic number, because the mean of its divisors is an integer number (18008495505).

Almost surely, 2^881261505504 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 881261505504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296611676360).

881261505504 is an abundant number, since it is smaller than the sum of its proper divisors (1711961847216).

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

881261505504 is a wasteful number, since it uses less digits than its factorization.

881261505504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29313 (or 29302 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 881261505504 in words is "eight hundred eighty-one billion, two hundred sixty-one million, five hundred five thousand, five hundred four".