27968745897 has 12 divisors (see below), whose sum is σ = 40404533364. Its totient is φ = 18643415040.

The previous prime is 27968745881. The next prime is 27968745901. The reversal of 27968745897 is 79854786972.

27968745897 is a `hidden beast` number, since 2 + 7 + 9 + 6 + 87 + 458 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13585301136 + 14383444761 = 116556^2 + 119931^2 .

It is not a de Polignac number, because 27968745897 - 2⁴ = 27968745881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27968745697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126504 + ... + 268217.

It is an arithmetic number, because the mean of its divisors is an integer number (3367044447).

Almost surely, 2^27968745897 is an apocalyptic number.

It is an amenable number.

27968745897 is a deficient number, since it is larger than the sum of its proper divisors (12435787467).

27968745897 is a wasteful number, since it uses less digits than its factorization.

27968745897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402600 (or 402597 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 72.

The spelling of 27968745897 in words is "twenty-seven billion, nine hundred sixty-eight million, seven hundred forty-five thousand, eight hundred ninety-seven".