189643692658 has 48 divisors (see below), whose sum is σ = 350411503680. Its totient is φ = 76536998496.

The previous prime is 189643692653. The next prime is 189643692673. The reversal of 189643692658 is 856296346981.

It is a junction number, because it is equal to n+sod(n) for n = 189643692593 and 189643692602.

It is not an unprimeable number, because it can be changed into a prime (189643692653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6016 + ... + 615892.

It is an arithmetic number, because the mean of its divisors is an integer number (7300239660).

Almost surely, 2^189643692658 is an apocalyptic number.

189643692658 is a deficient number, since it is larger than the sum of its proper divisors (160767811022).

189643692658 is a wasteful number, since it uses less digits than its factorization.

189643692658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610079 (or 610072 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 67.

The spelling of 189643692658 in words is "one hundred eighty-nine billion, six hundred forty-three million, six hundred ninety-two thousand, six hundred fifty-eight".