201671338545 has 32 divisors (see below), whose sum is σ = 358584714240. Its totient is φ = 107540680320.

The previous prime is 201671338511. The next prime is 201671338553. The reversal of 201671338545 is 545833176102.

It is a happy number.

201671338545 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 71 + 3 + 38 + 545 = 666.

201671338545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201671338545 - 2²⁰ = 201670289969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 201671338545.

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 31 ways as a sum of consecutive naturals, for example, 741312 + ... + 976158.

It is an arithmetic number, because the mean of its divisors is an integer number (11205772320).

Almost surely, 2^201671338545 is an apocalyptic number.

It is an amenable number.

201671338545 is a deficient number, since it is larger than the sum of its proper divisors (156913375695).

201671338545 is a wasteful number, since it uses less digits than its factorization.

201671338545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241222 (or 241216 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 201671338545 in words is "two hundred one billion, six hundred seventy-one million, three hundred thirty-eight thousand, five hundred forty-five".