189356545 has 16 divisors (see below), whose sum is σ = 264591360. Its totient is φ = 127393344.

The previous prime is 189356543. The next prime is 189356551. The reversal of 189356545 is 545653981.

It is not a de Polignac number, because 189356545 - 2¹ = 189356543 is a prime.

It is a super-2 number, since 2×189356545² = 71711802268674050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189356495 and 189356504.

It is not an unprimeable number, because it can be changed into a prime (189356543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49185 + ... + 52894.

It is an arithmetic number, because the mean of its divisors is an integer number (16536960).

Almost surely, 2^189356545 is an apocalyptic number.

It is an amenable number.

189356545 is a deficient number, since it is larger than the sum of its proper divisors (75234815).

189356545 is a wasteful number, since it uses less digits than its factorization.

189356545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102144.

The product of its digits is 648000, while the sum is 46.

The square root of 189356545 is about 13760.6883912107. The cubic root of 189356545 is about 574.2399990690.

The spelling of 189356545 in words is "one hundred eighty-nine million, three hundred fifty-six thousand, five hundred forty-five".