189475642945 has 16 divisors (see below), whose sum is σ = 232965084240. Its totient is φ = 147852518400.

The previous prime is 189475642859. The next prime is 189475642987. The reversal of 189475642945 is 549246574981.

It is a Cunningham number, because it is equal to 435288²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 3465441424 + 186010201521 = 58868^2 + 431289^2 .

It is not a de Polignac number, because 189475642945 - 2²³ = 189467254337 is a prime.

It is a super-2 number, since 2×189475642945² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 912205 + ... + 1100485.

It is an arithmetic number, because the mean of its divisors is an integer number (14560317765).

Almost surely, 2^189475642945 is an apocalyptic number.

It is an amenable number.

189475642945 is a deficient number, since it is larger than the sum of its proper divisors (43489441295).

189475642945 is a wasteful number, since it uses less digits than its factorization.

189475642945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193236.

The product of its digits is 87091200, while the sum is 64.

The spelling of 189475642945 in words is "one hundred eighty-nine billion, four hundred seventy-five million, six hundred forty-two thousand, nine hundred forty-five".