199636294545 has 64 divisors (see below), whose sum is σ = 362607805440. Its totient is φ = 104164890624.

The previous prime is 199636294519. The next prime is 199636294549. The reversal of 199636294545 is 545492636991.

199636294545 is a `hidden beast` number, since 1 + 9 + 9 + 63 + 6 + 29 + 4 + 545 = 666.

It is not a de Polignac number, because 199636294545 - 2⁸ = 199636294289 is a prime.

It is a super-3 number, since 3×199636294545³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (199636294549) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21016237 + ... + 21025733.

It is an arithmetic number, because the mean of its divisors is an integer number (5665746960).

Almost surely, 2^199636294545 is an apocalyptic number.

199636294545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199636294545 is a deficient number, since it is larger than the sum of its proper divisors (162971510895).

199636294545 is a wasteful number, since it uses less digits than its factorization.

199636294545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12871 (or 12865 counting only the distinct ones).

The product of its digits is 62985600, while the sum is 63.

The spelling of 199636294545 in words is "one hundred ninety-nine billion, six hundred thirty-six million, two hundred ninety-four thousand, five hundred forty-five".