27755525551 has 12 divisors (see below), whose sum is σ = 30059502408. Its totient is φ = 25616476704.

The previous prime is 27755525537. The next prime is 27755525557. The reversal of 27755525551 is 15552555772.

It is not a de Polignac number, because 27755525551 - 2²⁷ = 27621307823 is a prime.

It is a super-2 number, since 2×27755525551² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27755525495 and 27755525504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27755525557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2009796 + ... + 2023558.

It is an arithmetic number, because the mean of its divisors is an integer number (2504958534).

Almost surely, 2^27755525551 is an apocalyptic number.

27755525551 is a deficient number, since it is larger than the sum of its proper divisors (2303976857).

27755525551 is a wasteful number, since it uses less digits than its factorization.

27755525551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25722 (or 25709 counting only the distinct ones).

The product of its digits is 3062500, while the sum is 49.

The spelling of 27755525551 in words is "twenty-seven billion, seven hundred fifty-five million, five hundred twenty-five thousand, five hundred fifty-one".