881518187664 has 45 divisors (see below), whose sum is σ = 2467058126169. Its totient is φ = 293835640320.

The previous prime is 881518187657. The next prime is 881518187909. The reversal of 881518187664 is 466781815188.

The square root of 881518187664 is 938892.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 863583621264 + 17934566400 = 929292^2 + 133920^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11227584 + ... + 11305824.

Almost surely, 2^881518187664 is an apocalyptic number.

881518187664 is the 938892-nd square number.

It is an amenable number.

881518187664 is an abundant number, since it is smaller than the sum of its proper divisors (1585539938505).

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

881518187664 is an frugal number, since it uses more digits than its factorization.

881518187664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156496 (or 78246 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 63.

The spelling of 881518187664 in words is "eight hundred eighty-one billion, five hundred eighteen million, one hundred eighty-seven thousand, six hundred sixty-four".