27121612151537 has 2 divisors, whose sum is σ = 27121612151538. Its totient is φ = 27121612151536.

The previous prime is 27121612151497. The next prime is 27121612151573. The reversal of 27121612151537 is 73515121612172.

Together with next prime (27121612151573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26265942750961 + 855669400576 = 5125031^2 + 925024^2 .

It is a cyclic number.

It is not a de Polignac number, because 27121612151537 - 2¹⁴ = 27121612135153 is a prime.

It is not a weakly prime, because it can be changed into another prime (27121612151587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13560806075768 + 13560806075769.

It is an arithmetic number, because the mean of its divisors is an integer number (13560806075769).

Almost surely, 2^{27121612151537} is an apocalyptic number.

It is an amenable number.

27121612151537 is a deficient number, since it is larger than the sum of its proper divisors (1).

27121612151537 is an equidigital number, since it uses as much as digits as its factorization.

27121612151537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 44.

The spelling of 27121612151537 in words is "twenty-seven trillion, one hundred twenty-one billion, six hundred twelve million, one hundred fifty-one thousand, five hundred thirty-seven".