18145729945 has 8 divisors (see below), whose sum is σ = 24885572544. Its totient is φ = 12442786224.

The previous prime is 18145729933. The next prime is 18145729951. The reversal of 18145729945 is 54992754181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18145729945 - 2⁵ = 18145729913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259224679 + ... + 259224748.

It is an arithmetic number, because the mean of its divisors is an integer number (3110696568).

Almost surely, 2^18145729945 is an apocalyptic number.

It is an amenable number.

18145729945 is a deficient number, since it is larger than the sum of its proper divisors (6739842599).

18145729945 is an equidigital number, since it uses as much as digits as its factorization.

18145729945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518449439.

The product of its digits is 3628800, while the sum is 55.

The spelling of 18145729945 in words is "eighteen billion, one hundred forty-five million, seven hundred twenty-nine thousand, nine hundred forty-five".