191445946645 has 16 divisors (see below), whose sum is σ = 241837750080. Its totient is φ = 145089100800.

The previous prime is 191445946639. The next prime is 191445946687. The reversal of 191445946645 is 546649544191.

It is not a de Polignac number, because 191445946645 - 2¹⁵ = 191445913877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191445946645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3101685 + ... + 3162805.

It is an arithmetic number, because the mean of its divisors is an integer number (15114859380).

Almost surely, 2^191445946645 is an apocalyptic number.

It is an amenable number.

191445946645 is a deficient number, since it is larger than the sum of its proper divisors (50391803435).

191445946645 is a wasteful number, since it uses less digits than its factorization.

191445946645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94116.

The product of its digits is 18662400, while the sum is 58.

The spelling of 191445946645 in words is "one hundred ninety-one billion, four hundred forty-five million, nine hundred forty-six thousand, six hundred forty-five".