27489543961 has 16 divisors (see below), whose sum is σ = 31029739200. Its totient is φ = 24123265600.

The previous prime is 27489543943. The next prime is 27489543971. The reversal of 27489543961 is 16934598472.

It is a cyclic number.

It is not a de Polignac number, because 27489543961 - 2⁵ = 27489543929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27489543896 and 27489543905.

It is not an unprimeable number, because it can be changed into a prime (27489543901) 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, 2117751 + ... + 2130691.

It is an arithmetic number, because the mean of its divisors is an integer number (1939358700).

Almost surely, 2^27489543961 is an apocalyptic number.

It is an amenable number.

27489543961 is a deficient number, since it is larger than the sum of its proper divisors (3540195239).

27489543961 is a wasteful number, since it uses less digits than its factorization.

27489543961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640.

The product of its digits is 13063680, while the sum is 58.

The spelling of 27489543961 in words is "twenty-seven billion, four hundred eighty-nine million, five hundred forty-three thousand, nine hundred sixty-one".