189790297545 has 16 divisors (see below), whose sum is σ = 303911588160. Its totient is φ = 101139121344.

The previous prime is 189790297453. The next prime is 189790297547. The reversal of 189790297545 is 545792097981.

It is not a de Polignac number, because 189790297545 - 2¹⁷ = 189790166473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189790297547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5129119 + ... + 5165988.

It is an arithmetic number, because the mean of its divisors is an integer number (18994474260).

Almost surely, 2^189790297545 is an apocalyptic number.

189790297545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189790297545 is a deficient number, since it is larger than the sum of its proper divisors (114121290615).

189790297545 is a wasteful number, since it uses less digits than its factorization.

189790297545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10296344.

The product of its (nonzero) digits is 57153600, while the sum is 66.

The spelling of 189790297545 in words is "one hundred eighty-nine billion, seven hundred ninety million, two hundred ninety-seven thousand, five hundred forty-five".