18150286729 has 9 divisors (see below), whose sum is σ = 18268937607. Its totient is φ = 18032404104.

The previous prime is 18150286727. The next prime is 18150286757. The reversal of 18150286729 is 92768205181.

It is a happy number.

The square root of 18150286729 is 134723.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18043205625 + 107081104 = 134325^2 + 10348^2 .

It is not a de Polignac number, because 18150286729 - 2¹ = 18150286727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18150286727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26809539 + ... + 26810215.

Almost surely, 2^18150286729 is an apocalyptic number.

18150286729 is the 134723-rd square number.

18150286729 is the 67362-nd centered octagonal number.

It is an amenable number.

18150286729 is a deficient number, since it is larger than the sum of its proper divisors (118650878).

18150286729 is an frugal number, since it uses more digits than its factorization.

18150286729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

Multiplying 18150286729 by its sum of digits (49), we get a square (889364049721 = 943061²).

The spelling of 18150286729 in words is "eighteen billion, one hundred fifty million, two hundred eighty-six thousand, seven hundred twenty-nine".