191028436624 has 15 divisors (see below), whose sum is σ = 370120983267. Its totient is φ = 95513344176.

The previous prime is 191028436609. The next prime is 191028436633. The reversal of 191028436624 is 426634820191.

The square root of 191028436624 is 437068.

It is a perfect power (a square), and thus also a powerful number.

191028436624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 1693639 + ... + 1802905.

Almost surely, 2^191028436624 is an apocalyptic number.

191028436624 is the 437068-th square number.

It is an amenable number.

191028436624 is a deficient number, since it is larger than the sum of its proper divisors (179092546643).

191028436624 is an frugal number, since it uses more digits than its factorization.

191028436624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218542 (or 109269 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 191028436624 in words is "one hundred ninety-one billion, twenty-eight million, four hundred thirty-six thousand, six hundred twenty-four".