189490199449 has 8 divisors (see below), whose sum is σ = 195643699200. Its totient is φ = 183339256800.

The previous prime is 189490199441. The next prime is 189490199527. The reversal of 189490199449 is 944991094981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189490199449 - 2³ = 189490199441 is a prime.

It is a super-3 number, since 3×189490199449³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189490199441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488092 + ... + 785629.

It is an arithmetic number, because the mean of its divisors is an integer number (24455462400).

Almost surely, 2^189490199449 is an apocalyptic number.

It is an amenable number.

189490199449 is a deficient number, since it is larger than the sum of its proper divisors (6153499751).

189490199449 is a wasteful number, since it uses less digits than its factorization.

189490199449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278551.

The product of its (nonzero) digits is 30233088, while the sum is 67.

The spelling of 189490199449 in words is "one hundred eighty-nine billion, four hundred ninety million, one hundred ninety-nine thousand, four hundred forty-nine".