27135451881 has 6 divisors (see below), whose sum is σ = 39195652730. Its totient is φ = 18090301248.

The previous prime is 27135451877. The next prime is 27135451883. The reversal of 27135451881 is 18815453172.

27135451881 is a `hidden beast` number, since 2 + 7 + 1 + 3 + 54 + 518 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18075458025 + 9059993856 = 134445^2 + 95184^2 .

It is not a de Polignac number, because 27135451881 - 2² = 27135451877 is a prime.

It is a super-2 number, since 2×27135451881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27135451883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1507525096 + ... + 1507525113.

Almost surely, 2^27135451881 is an apocalyptic number.

It is an amenable number.

27135451881 is a deficient number, since it is larger than the sum of its proper divisors (12060200849).

27135451881 is a wasteful number, since it uses less digits than its factorization.

27135451881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015050215 (or 3015050212 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The spelling of 27135451881 in words is "twenty-seven billion, one hundred thirty-five million, four hundred fifty-one thousand, eight hundred eighty-one".