189773449731 has 48 divisors (see below), whose sum is σ = 288004294656. Its totient is φ = 120306558528.

The previous prime is 189773449729. The next prime is 189773449777. The reversal of 189773449731 is 137944377981.

189773449731 is a `hidden beast` number, since 1 + 8 + 97 + 73 + 449 + 7 + 31 = 666.

It is not a de Polignac number, because 189773449731 - 2¹ = 189773449729 is a prime.

It is a super-2 number, since 2×189773449731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189773449781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2268066 + ... + 2350248.

It is an arithmetic number, because the mean of its divisors is an integer number (6000089472).

Almost surely, 2^189773449731 is an apocalyptic number.

189773449731 is a deficient number, since it is larger than the sum of its proper divisors (98230844925).

189773449731 is a wasteful number, since it uses less digits than its factorization.

189773449731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82392 (or 82389 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 189773449731 in words is "one hundred eighty-nine billion, seven hundred seventy-three million, four hundred forty-nine thousand, seven hundred thirty-one".