38189654777 has 4 divisors (see below), whose sum is σ = 40436105076. Its totient is φ = 35943204480.

The previous prime is 38189654773. The next prime is 38189654791. The reversal of 38189654777 is 77745698183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21922948096 + 16266706681 = 148064^2 + 127541^2 .

It is a cyclic number.

It is not a de Polignac number, because 38189654777 - 2² = 38189654773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38189654773) 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, 1123225124 + ... + 1123225157.

It is an arithmetic number, because the mean of its divisors is an integer number (10109026269).

Almost surely, 2^38189654777 is an apocalyptic number.

It is an amenable number.

38189654777 is a deficient number, since it is larger than the sum of its proper divisors (2246450299).

38189654777 is a wasteful number, since it uses less digits than its factorization.

38189654777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246450298.

The product of its digits is 71124480, while the sum is 65.

The spelling of 38189654777 in words is "thirty-eight billion, one hundred eighty-nine million, six hundred fifty-four thousand, seven hundred seventy-seven".