189490199448 has 64 divisors (see below), whose sum is σ = 543991017600. Its totient is φ = 54399098880.

The previous prime is 189490199441. The next prime is 189490199527. The reversal of 189490199448 is 844991094981.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189490199441) 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, 18883561 + ... + 18893592.

It is an arithmetic number, because the mean of its divisors is an integer number (8499859650).

Almost surely, 2^189490199448 is an apocalyptic number.

It is an amenable number.

189490199448 is an abundant number, since it is smaller than the sum of its proper divisors (354500818152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189490199448 is a wasteful number, since it uses less digits than its factorization.

189490199448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37777192 (or 37777188 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 66.

The spelling of 189490199448 in words is "one hundred eighty-nine billion, four hundred ninety million, one hundred ninety-nine thousand, four hundred forty-eight".