27634531397 has 12 divisors (see below), whose sum is σ = 30379612620. Its totient is φ = 25118607360.

The previous prime is 27634531381. The next prime is 27634531411. The reversal of 27634531397 is 79313543672.

It can be written as a sum of positive squares in 2 ways, for example, as 23240697601 + 4393833796 = 152449^2 + 66286^2 .

It is not a de Polignac number, because 27634531397 - 2⁴ = 27634531381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27634531307) 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 11 ways as a sum of consecutive naturals, for example, 1134179 + ... + 1158287.

It is an arithmetic number, because the mean of its divisors is an integer number (2531634385).

Almost surely, 2^27634531397 is an apocalyptic number.

It is an amenable number.

27634531397 is a deficient number, since it is larger than the sum of its proper divisors (2745081223).

27634531397 is a wasteful number, since it uses less digits than its factorization.

27634531397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33604 (or 33593 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 50.

The spelling of 27634531397 in words is "twenty-seven billion, six hundred thirty-four million, five hundred thirty-one thousand, three hundred ninety-seven".