27130716561 has 16 divisors (see below), whose sum is σ = 38974591040. Its totient is φ = 16688255040.

The previous prime is 27130716553. The next prime is 27130716563. The reversal of 27130716561 is 16561703172.

It is not a de Polignac number, because 27130716561 - 2³ = 27130716553 is a prime.

It is a super-2 number, since 2×27130716561² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27130716563) 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, 69991 + ... + 243228.

It is an arithmetic number, because the mean of its divisors is an integer number (2435911940).

Almost surely, 2^27130716561 is an apocalyptic number.

It is an amenable number.

27130716561 is a deficient number, since it is larger than the sum of its proper divisors (11843874479).

27130716561 is a wasteful number, since it uses less digits than its factorization.

27130716561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315456.

The product of its (nonzero) digits is 52920, while the sum is 39.

The spelling of 27130716561 in words is "twenty-seven billion, one hundred thirty million, seven hundred sixteen thousand, five hundred sixty-one".