18055366537 has 8 divisors (see below), whose sum is σ = 19461479240. Its totient is φ = 16651716480.

The previous prime is 18055366507. The next prime is 18055366577. The reversal of 18055366537 is 73566355081.

It can be written as a sum of positive squares in 4 ways, for example, as 507330576 + 17548035961 = 22524^2 + 132469^2 .

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 18055366537 - 2¹⁹ = 18054842249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18055366507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600414 + ... + 629767.

It is an arithmetic number, because the mean of its divisors is an integer number (2432684905).

Almost surely, 2^18055366537 is an apocalyptic number.

It is an amenable number.

18055366537 is a deficient number, since it is larger than the sum of its proper divisors (1406112703).

18055366537 is a wasteful number, since it uses less digits than its factorization.

18055366537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231323.

The product of its (nonzero) digits is 2268000, while the sum is 49.

The spelling of 18055366537 in words is "eighteen billion, fifty-five million, three hundred sixty-six thousand, five hundred thirty-seven".