10081581587 has 24 divisors (see below), whose sum is σ = 13546278000. Its totient is φ = 7393666560.

The previous prime is 10081581563. The next prime is 10081581661. The reversal of 10081581587 is 78518518001.

It is a de Polignac number, because none of the positive numbers 2^k-10081581587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10081581527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540962 + ... + 559287.

It is an arithmetic number, because the mean of its divisors is an integer number (564428250).

Almost surely, 2^10081581587 is an apocalyptic number.

10081581587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

10081581587 is a deficient number, since it is larger than the sum of its proper divisors (3464696413).

10081581587 is a wasteful number, since it uses less digits than its factorization.

10081581587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100291 (or 1100284 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 44.

The spelling of 10081581587 in words is "ten billion, eighty-one million, five hundred eighty-one thousand, five hundred eighty-seven".