8531049681 has 80 divisors (see below), whose sum is σ = 16401420288. Its totient is φ = 4288658400.

The previous prime is 8531049679. The next prime is 8531049697. The reversal of 8531049681 is 1869401358.

8531049681 is a `hidden beast` number, since 85 + 3 + 1 + 0 + 496 + 81 = 666.

It is not a de Polignac number, because 8531049681 - 2¹ = 8531049679 is a prime.

It is a super-2 number, since 2×8531049681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8531049641) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 171286 + ... + 215408.

Almost surely, 2^8531049681 is an apocalyptic number.

8531049681 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8531049681 is a deficient number, since it is larger than the sum of its proper divisors (7870370607).

8531049681 is a wasteful number, since it uses less digits than its factorization.

8531049681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44184 (or 44175 counting only the distinct ones).

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

The square root of 8531049681 is about 92363.6816124173. The cubic root of 8531049681 is about 2043.3095134188.

The spelling of 8531049681 in words is "eight billion, five hundred thirty-one million, forty-nine thousand, six hundred eighty-one".