18149136536 has 8 divisors (see below), whose sum is σ = 34029631020. Its totient is φ = 9074568264.

The previous prime is 18149136517. The next prime is 18149136559. The reversal of 18149136536 is 63563194181.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1134321026 + ... + 1134321041.

Almost surely, 2^18149136536 is an apocalyptic number.

It is an amenable number.

18149136536 is a deficient number, since it is larger than the sum of its proper divisors (15880494484).

18149136536 is a wasteful number, since it uses less digits than its factorization.

18149136536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268642073 (or 2268642069 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The spelling of 18149136536 in words is "eighteen billion, one hundred forty-nine million, one hundred thirty-six thousand, five hundred thirty-six".