189426949563 has 16 divisors (see below), whose sum is σ = 273116206080. Its totient is φ = 116327270016.

The previous prime is 189426949519. The next prime is 189426949583. The reversal of 189426949563 is 365949624981.

It is not a de Polignac number, because 189426949563 - 2⁹ = 189426949051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189426949494 and 189426949503.

It is not an unprimeable number, because it can be changed into a prime (189426949583) 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 15 ways as a sum of consecutive naturals, for example, 39510943 + ... + 39515736.

It is an arithmetic number, because the mean of its divisors is an integer number (17069762880).

Almost surely, 2^189426949563 is an apocalyptic number.

189426949563 is a deficient number, since it is larger than the sum of its proper divisors (83689256517).

189426949563 is a wasteful number, since it uses less digits than its factorization.

189426949563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79026746.

The product of its digits is 100776960, while the sum is 66.

The spelling of 189426949563 in words is "one hundred eighty-nine billion, four hundred twenty-six million, nine hundred forty-nine thousand, five hundred sixty-three".