27149018531 has 2 divisors, whose sum is σ = 27149018532. Its totient is φ = 27149018530.

The previous prime is 27149018527. The next prime is 27149018573. The reversal of 27149018531 is 13581094172.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27149018531 - 2² = 27149018527 is a prime.

It is a super-2 number, since 2×27149018531² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27149018591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13574509265 + 13574509266.

It is an arithmetic number, because the mean of its divisors is an integer number (13574509266).

Almost surely, 2^27149018531 is an apocalyptic number.

27149018531 is a deficient number, since it is larger than the sum of its proper divisors (1).

27149018531 is an equidigital number, since it uses as much as digits as its factorization.

27149018531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 27149018531 in words is "twenty-seven billion, one hundred forty-nine million, eighteen thousand, five hundred thirty-one".