887144248981 has 4 divisors (see below), whose sum is σ = 887157562252. Its totient is φ = 887130935712.

The previous prime is 887144248973. The next prime is 887144249009. The reversal of 887144248981 is 189842441788.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 336185434225 + 550958814756 = 579815^2 + 742266^2 .

It is a cyclic number.

It is not a de Polignac number, because 887144248981 - 2³ = 887144248973 is a prime.

It is a super-2 number, since 2×887144248981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (887144248931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6556176 + ... + 6690121.

It is an arithmetic number, because the mean of its divisors is an integer number (221789390563).

Almost surely, 2^887144248981 is an apocalyptic number.

It is an amenable number.

887144248981 is a deficient number, since it is larger than the sum of its proper divisors (13313271).

887144248981 is a wasteful number, since it uses less digits than its factorization.

887144248981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313270.

The product of its digits is 33030144, while the sum is 64.

The spelling of 887144248981 in words is "eight hundred eighty-seven billion, one hundred forty-four million, two hundred forty-eight thousand, nine hundred eighty-one".