8081558631 has 6 divisors (see below), whose sum is σ = 11673362480. Its totient is φ = 5387705748.

The previous prime is 8081558593. The next prime is 8081558657. The reversal of 8081558631 is 1368551808.

8081558631 is a `hidden beast` number, since 8 + 0 + 8 + 1 + 5 + 5 + 8 + 631 = 666.

It is not a de Polignac number, because 8081558631 - 2¹⁴ = 8081542247 is a prime.

It is a super-2 number, since 2×8081558631² (a number of 21 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 (8081558131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448975471 + ... + 448975488.

Almost surely, 2^8081558631 is an apocalyptic number.

8081558631 is a deficient number, since it is larger than the sum of its proper divisors (3591803849).

8081558631 is a wasteful number, since it uses less digits than its factorization.

8081558631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897950965 (or 897950962 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 8081558631 is about 89897.4895700653. The cubic root of 8081558631 is about 2006.7735859515.

The spelling of 8081558631 in words is "eight billion, eighty-one million, five hundred fifty-eight thousand, six hundred thirty-one".