18775457782 has 16 divisors (see below), whose sum is σ = 28645390800. Its totient is φ = 9227048320.

The previous prime is 18775457777. The next prime is 18775457783. The reversal of 18775457782 is 28775457781.

It is a self number, because there is not a number n which added to its sum of digits gives 18775457782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18775457783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015194 + ... + 1033522.

It is an arithmetic number, because the mean of its divisors is an integer number (1790336925).

Almost surely, 2^18775457782 is an apocalyptic number.

18775457782 is a deficient number, since it is larger than the sum of its proper divisors (9869933018).

18775457782 is a wasteful number, since it uses less digits than its factorization.

18775457782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27071.

The product of its digits is 30732800, while the sum is 61.

Subtracting 18775457782 from its reverse (28775457781), we obtain a palindrome (9999999999).

The spelling of 18775457782 in words is "eighteen billion, seven hundred seventy-five million, four hundred fifty-seven thousand, seven hundred eighty-two".