27078319561 has 8 divisors (see below), whose sum is σ = 27256390400. Its totient is φ = 26900319888.

The previous prime is 27078319531. The next prime is 27078319577. The reversal of 27078319561 is 16591387072.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27078319561 - 2¹³ = 27078311369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27078319531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900040 + ... + 929638.

It is an arithmetic number, because the mean of its divisors is an integer number (3407048800).

Almost surely, 2^27078319561 is an apocalyptic number.

It is an amenable number.

27078319561 is a deficient number, since it is larger than the sum of its proper divisors (178070839).

27078319561 is a wasteful number, since it uses less digits than its factorization.

27078319561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35583.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 27078319561 in words is "twenty-seven billion, seventy-eight million, three hundred nineteen thousand, five hundred sixty-one".