189797790457 has 8 divisors (see below), whose sum is σ = 208682468352. Its totient is φ = 171184834800.

The previous prime is 189797790449. The next prime is 189797790463. The reversal of 189797790457 is 754097797981.

189797790457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 189797790457 - 2³ = 189797790449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189797790457.

It is not an unprimeable number, because it can be changed into a prime (189797796457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67929094 + ... + 67931887.

It is an arithmetic number, because the mean of its divisors is an integer number (26085308544).

Almost surely, 2^189797790457 is an apocalyptic number.

It is an amenable number.

189797790457 is a deficient number, since it is larger than the sum of its proper divisors (18884677895).

189797790457 is a wasteful number, since it uses less digits than its factorization.

189797790457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135861119.

The product of its (nonzero) digits is 280052640, while the sum is 73.

The spelling of 189797790457 in words is "one hundred eighty-nine billion, seven hundred ninety-seven million, seven hundred ninety thousand, four hundred fifty-seven".