27803887881 has 16 divisors (see below), whose sum is σ = 46219450368. Its totient is φ = 14443578000.

The previous prime is 27803887871. The next prime is 27803887907. The reversal of 27803887881 is 18878830872.

It is not a de Polignac number, because 27803887881 - 2²⁵ = 27770333449 is a prime.

It is a super-2 number, since 2×27803887881² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27803887871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60181345 + ... + 60181806.

It is an arithmetic number, because the mean of its divisors is an integer number (2888715648).

Almost surely, 2^27803887881 is an apocalyptic number.

27803887881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27803887881 is a deficient number, since it is larger than the sum of its proper divisors (18415562487).

27803887881 is a wasteful number, since it uses less digits than its factorization.

27803887881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120363172.

The product of its (nonzero) digits is 9633792, while the sum is 60.

The spelling of 27803887881 in words is "twenty-seven billion, eight hundred three million, eight hundred eighty-seven thousand, eight hundred eighty-one".