189465674738 has 18 divisors (see below), whose sum is σ = 291338057133. Its totient is φ = 92409968880.

The previous prime is 189465674719. The next prime is 189465674767. The reversal of 189465674738 is 837476564981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135308472649 + 54157202089 = 367843^2 + 232717^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=307787.

It is a super-2 number, since 2×189465674738² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 25234781 + ... + 25242287.

Almost surely, 2^189465674738 is an apocalyptic number.

189465674738 is a deficient number, since it is larger than the sum of its proper divisors (101872382395).

189465674738 is an frugal number, since it uses more digits than its factorization.

189465674738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15098 (or 7550 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 68.

The spelling of 189465674738 in words is "one hundred eighty-nine billion, four hundred sixty-five million, six hundred seventy-four thousand, seven hundred thirty-eight".