1818661527 has 12 divisors (see below), whose sum is σ = 2634118240. Its totient is φ = 1209135168.

The previous prime is 1818661517. The next prime is 1818661549. The reversal of 1818661527 is 7251668181.

1818661527 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 6 + 615 + 27 = 666.

It is not a de Polignac number, because 1818661527 - 2¹⁹ = 1818137239 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 (1818661517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272002 + ... + 278607.

Almost surely, 2^1818661527 is an apocalyptic number.

1818661527 is a deficient number, since it is larger than the sum of its proper divisors (815456713).

1818661527 is a wasteful number, since it uses less digits than its factorization.

1818661527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550982 (or 550979 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 1818661527 is about 42645.7679846430. The cubic root of 1818661527 is about 1220.6297758510.

The spelling of 1818661527 in words is "one billion, eight hundred eighteen million, six hundred sixty-one thousand, five hundred twenty-seven".