189806693958 has 48 divisors (see below), whose sum is σ = 487404852480. Its totient is φ = 54230483016.

The previous prime is 189806693903. The next prime is 189806694043. The reversal of 189806693958 is 859396608981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27892938 + ... + 27899741.

It is an arithmetic number, because the mean of its divisors is an integer number (10154267760).

Almost surely, 2^189806693958 is an apocalyptic number.

189806693958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

189806693958 is an abundant number, since it is smaller than the sum of its proper divisors (297598158522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189806693958 is an equidigital number, since it uses as much as digits as its factorization.

189806693958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55792703 (or 55792691 counting only the distinct ones).

The product of its (nonzero) digits is 201553920, while the sum is 72.

The spelling of 189806693958 in words is "one hundred eighty-nine billion, eight hundred six million, six hundred ninety-three thousand, nine hundred fifty-eight".