18605757648 has 40 divisors (see below), whose sum is σ = 49087536768. Its totient is φ = 6069962752.

The previous prime is 18605757631. The next prime is 18605757659. The reversal of 18605757648 is 84675750681.

It is a happy number.

It is a super-2 number, since 2×18605757648² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121361 + ... + 4125872.

Almost surely, 2^18605757648 is an apocalyptic number.

It is an amenable number.

18605757648 is an abundant number, since it is smaller than the sum of its proper divisors (30481779120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18605757648 is a wasteful number, since it uses less digits than its factorization.

18605757648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8247291 (or 8247285 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 18605757648 in words is "eighteen billion, six hundred five million, seven hundred fifty-seven thousand, six hundred forty-eight".