188318783645 has 16 divisors (see below), whose sum is σ = 229152976752. Its totient is φ = 148542750720.

The previous prime is 188318783603. The next prime is 188318783699. The reversal of 188318783645 is 546387813881.

It can be written as a sum of positive squares in 8 ways, for example, as 98418356089 + 89900427556 = 313717^2 + 299834^2 .

It is not a de Polignac number, because 188318783645 - 2¹⁰ = 188318782621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056509 + ... + 1221821.

It is an arithmetic number, because the mean of its divisors is an integer number (14322061047).

Almost surely, 2^188318783645 is an apocalyptic number.

It is an amenable number.

188318783645 is a deficient number, since it is larger than the sum of its proper divisors (40834193107).

188318783645 is a wasteful number, since it uses less digits than its factorization.

188318783645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168512.

The product of its digits is 30965760, while the sum is 62.

The spelling of 188318783645 in words is "one hundred eighty-eight billion, three hundred eighteen million, seven hundred eighty-three thousand, six hundred forty-five".