189070377779 has 4 divisors (see below), whose sum is σ = 191892323784. Its totient is φ = 186248431776.

The previous prime is 189070377773. The next prime is 189070377781. The reversal of 189070377779 is 977773070981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189070377779 - 2⁸ = 189070377523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189070377773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410972902 + ... + 1410973035.

It is an arithmetic number, because the mean of its divisors is an integer number (47973080946).

Almost surely, 2^189070377779 is an apocalyptic number.

189070377779 is a deficient number, since it is larger than the sum of its proper divisors (2821946005).

189070377779 is an equidigital number, since it uses as much as digits as its factorization.

189070377779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821946004.

The product of its (nonzero) digits is 32672808, while the sum is 65.

The spelling of 189070377779 in words is "one hundred eighty-nine billion, seventy million, three hundred seventy-seven thousand, seven hundred seventy-nine".