18127485497 has 4 divisors (see below), whose sum is σ = 19775438736. Its totient is φ = 16479532260.

The previous prime is 18127485479. The next prime is 18127485499. The reversal of 18127485497 is 79458472181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18127485497 - 2⁶ = 18127485433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18127485499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823976603 + ... + 823976624.

It is an arithmetic number, because the mean of its divisors is an integer number (4943859684).

Almost surely, 2^18127485497 is an apocalyptic number.

It is an amenable number.

18127485497 is a deficient number, since it is larger than the sum of its proper divisors (1647953239).

18127485497 is a wasteful number, since it uses less digits than its factorization.

18127485497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647953238.

The product of its digits is 4515840, while the sum is 56.

The spelling of 18127485497 in words is "eighteen billion, one hundred twenty-seven million, four hundred eighty-five thousand, four hundred ninety-seven".