18475890652449 has 32 divisors (see below), whose sum is σ = 27386291095040. Its totient is φ = 12310691689296.

The previous prime is 18475890652433. The next prime is 18475890652469. The reversal of 18475890652449 is 94425609857481.

It is a happy number.

18475890652449 is a `hidden beast` number, since 1 + 8 + 4 + 7 + 5 + 8 + 90 + 6 + 524 + 4 + 9 = 666.

It is not a de Polignac number, because 18475890652449 - 2⁴ = 18475890652433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18475890652469) 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 31 ways as a sum of consecutive naturals, for example, 439431222 + ... + 439473264.

It is an arithmetic number, because the mean of its divisors is an integer number (855821596720).

Almost surely, 2^{18475890652449} is an apocalyptic number.

It is an amenable number.

18475890652449 is a deficient number, since it is larger than the sum of its proper divisors (8910400442591).

18475890652449 is a wasteful number, since it uses less digits than its factorization.

18475890652449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50346 (or 50340 counting only the distinct ones).

The product of its (nonzero) digits is 696729600, while the sum is 72.

The spelling of 18475890652449 in words is "eighteen trillion, four hundred seventy-five billion, eight hundred ninety million, six hundred fifty-two thousand, four hundred forty-nine".