191201852545 has 24 divisors (see below), whose sum is σ = 258635350080. Its totient is φ = 134570181600.

The previous prime is 191201852503. The next prime is 191201852557. The reversal of 191201852545 is 545258102191.

It is not a de Polignac number, because 191201852545 - 2⁹ = 191201852033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1755885 + ... + 1861594.

It is an arithmetic number, because the mean of its divisors is an integer number (10776472920).

Almost surely, 2^191201852545 is an apocalyptic number.

It is an amenable number.

191201852545 is a deficient number, since it is larger than the sum of its proper divisors (67433497535).

191201852545 is a wasteful number, since it uses less digits than its factorization.

191201852545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617557 (or 3617526 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 43.

The spelling of 191201852545 in words is "one hundred ninety-one billion, two hundred one million, eight hundred fifty-two thousand, five hundred forty-five".