881934561 has 10 divisors (see below), whose sum is σ = 1317457922. Its totient is φ = 587956320.

The previous prime is 881934539. The next prime is 881934583. The reversal of 881934561 is 165439188.

881934561 is a `hidden beast` number, since 8 + 8 + 193 + 456 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (881934539) and next prime (881934583).

It can be written as a sum of positive squares in only one way, i.e., 824780961 + 57153600 = 28719^2 + 7560^2 .

It is not a de Polignac number, because 881934561 - 2⁶ = 881934497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (881934061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5443960 + ... + 5444121.

Almost surely, 2^881934561 is an apocalyptic number.

881934561 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

881934561 is a deficient number, since it is larger than the sum of its proper divisors (435523361).

881934561 is a wasteful number, since it uses less digits than its factorization.

881934561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10888093 (or 10888084 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 881934561 is about 29697.3830665262. The cubic root of 881934561 is about 958.9856767038.

The spelling of 881934561 in words is "eight hundred eighty-one million, nine hundred thirty-four thousand, five hundred sixty-one".