18500015739745 has 8 divisors (see below), whose sum is σ = 23505902351784. Its totient is φ = 13929423615744.

The previous prime is 18500015739739. The next prime is 18500015739761. The reversal of 18500015739745 is 54793751000581.

It can be written as a sum of positive squares in 4 ways, for example, as 10447582281984 + 8052433457761 = 3232272^2 + 2837681^2 .

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 18500015739745 - 2⁵ = 18500015739713 is a prime.

It is a Duffinian number.

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, 108823621914 + ... + 108823622083.

It is an arithmetic number, because the mean of its divisors is an integer number (2938237793973).

Almost surely, 2^{18500015739745} is an apocalyptic number.

It is an amenable number.

18500015739745 is a deficient number, since it is larger than the sum of its proper divisors (5005886612039).

18500015739745 is a wasteful number, since it uses less digits than its factorization.

18500015739745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217647244019.

The product of its (nonzero) digits is 5292000, while the sum is 55.

The spelling of 18500015739745 in words is "eighteen trillion, five hundred billion, fifteen million, seven hundred thirty-nine thousand, seven hundred forty-five".