27772989597 has 24 divisors (see below), whose sum is σ = 41412818304. Its totient is φ = 17924667264.

The previous prime is 27772989581. The next prime is 27772989599. The reversal of 27772989597 is 79598927772.

It is a happy number.

27772989597 is a `hidden beast` number, since 2 + 7 + 7 + 7 + 29 + 8 + 9 + 597 = 666.

It is not a de Polignac number, because 27772989597 - 2⁴ = 27772989581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27772989599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273813 + ... + 361274.

It is an arithmetic number, because the mean of its divisors is an integer number (1725534096).

Almost surely, 2^27772989597 is an apocalyptic number.

It is an amenable number.

27772989597 is a deficient number, since it is larger than the sum of its proper divisors (13639828707).

27772989597 is a wasteful number, since it uses less digits than its factorization.

27772989597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635249 (or 635246 counting only the distinct ones).

The product of its digits is 280052640, while the sum is 72.

The spelling of 27772989597 in words is "twenty-seven billion, seven hundred seventy-two million, nine hundred eighty-nine thousand, five hundred ninety-seven".