10555556881 has 4 divisors (see below), whose sum is σ = 10801034992. Its totient is φ = 10310078772.

The previous prime is 10555556849. The next prime is 10555556897. The reversal of 10555556881 is 18865555501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10555556881 - 2⁵ = 10555556849 is a prime.

It is a super-2 number, since 2×10555556881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10555556821) 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, 122738991 + ... + 122739076.

It is an arithmetic number, because the mean of its divisors is an integer number (2700258748).

Almost surely, 2^10555556881 is an apocalyptic number.

It is an amenable number.

10555556881 is a deficient number, since it is larger than the sum of its proper divisors (245478111).

10555556881 is an equidigital number, since it uses as much as digits as its factorization.

10555556881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245478110.

The product of its (nonzero) digits is 1200000, while the sum is 49.

The spelling of 10555556881 in words is "ten billion, five hundred fifty-five million, five hundred fifty-six thousand, eight hundred eighty-one".