27599469897961 has 6 divisors (see below), whose sum is σ = 29885816516910. Its totient is φ = 25476433751808.

The previous prime is 27599469897959. The next prime is 27599469897991. The reversal of 27599469897961 is 16979896499572.

It can be written as a sum of positive squares in 3 ways, for example, as 3033013818025 + 24566456079936 = 1741555^2 + 4956456^2 .

It is not a de Polignac number, because 27599469897961 - 2¹ = 27599469897959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27599469897991) 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, 81655236216 + ... + 81655236553.

It is an arithmetic number, because the mean of its divisors is an integer number (4980969419485).

Almost surely, 2^{27599469897961} is an apocalyptic number.

It is an amenable number.

27599469897961 is a deficient number, since it is larger than the sum of its proper divisors (2286346618949).

27599469897961 is a wasteful number, since it uses less digits than its factorization.

27599469897961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163310472795 (or 163310472782 counting only the distinct ones).

The product of its digits is 33331979520, while the sum is 91.

The spelling of 27599469897961 in words is "twenty-seven trillion, five hundred ninety-nine billion, four hundred sixty-nine million, eight hundred ninety-seven thousand, nine hundred sixty-one".