10001055581 has 8 divisors (see below), whose sum is σ = 11016168384. Its totient is φ = 9003597120.

The previous prime is 10001055557. The next prime is 10001055583. The reversal of 10001055581 is 18555010001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10001055581 - 2¹⁸ = 10000793437 is a prime.

It is a super-2 number, since 2×10001055581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10001055581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001055583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4412396 + ... + 4414661.

It is an arithmetic number, because the mean of its divisors is an integer number (1377021048).

Almost surely, 2^10001055581 is an apocalyptic number.

10001055581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10001055581 is a deficient number, since it is larger than the sum of its proper divisors (1015112803).

10001055581 is a wasteful number, since it uses less digits than its factorization.

10001055581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8827171.

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 10001055581 its reverse (18555010001), we get a palindrome (28556065582).

The spelling of 10001055581 in words is "ten billion, one million, fifty-five thousand, five hundred eighty-one".