18037516255505 has 16 divisors (see below), whose sum is σ = 21675842092800. Its totient is φ = 14409465949440.

The previous prime is 18037516255501. The next prime is 18037516255519. The reversal of 18037516255505 is 50555261573081.

It is not a de Polignac number, because 18037516255505 - 2² = 18037516255501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18037516255501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142366985 + ... + 142493625.

It is an arithmetic number, because the mean of its divisors is an integer number (1354740130800).

Almost surely, 2^{18037516255505} is an apocalyptic number.

It is an amenable number.

18037516255505 is a deficient number, since it is larger than the sum of its proper divisors (3638325837295).

18037516255505 is a wasteful number, since it uses less digits than its factorization.

18037516255505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166984.

The product of its (nonzero) digits is 6300000, while the sum is 53.

The spelling of 18037516255505 in words is "eighteen trillion, thirty-seven billion, five hundred sixteen million, two hundred fifty-five thousand, five hundred five".