27397847081620 has 12 divisors (see below), whose sum is σ = 57535478871444. Its totient is φ = 10959138832640.

The previous prime is 27397847081599. The next prime is 27397847081629. The reversal of 27397847081620 is 2618074879372.

It can be written as a sum of positive squares in 2 ways, for example, as 13776108177924 + 13621738903696 = 3711618^2 + 3690764^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27397847081629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684946177021 + ... + 684946177060.

It is an arithmetic number, because the mean of its divisors is an integer number (4794623239287).

Almost surely, 2^{27397847081620} is an apocalyptic number.

27397847081620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27397847081620 is an abundant number, since it is smaller than the sum of its proper divisors (30137631789824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27397847081620 is a wasteful number, since it uses less digits than its factorization.

27397847081620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369892354090 (or 1369892354088 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 27397847081620 in words is "twenty-seven trillion, three hundred ninety-seven billion, eight hundred forty-seven million, eighty-one thousand, six hundred twenty".