197855508745 has 16 divisors (see below), whose sum is σ = 239445657792. Its totient is φ = 156940463680.

The previous prime is 197855508731. The next prime is 197855508749. The reversal of 197855508745 is 547805558791.

It is not a de Polignac number, because 197855508745 - 2²⁷ = 197721291017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197855508749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631899 + ... + 891631.

It is an arithmetic number, because the mean of its divisors is an integer number (14965353612).

Almost surely, 2^197855508745 is an apocalyptic number.

It is an amenable number.

197855508745 is a deficient number, since it is larger than the sum of its proper divisors (41590149047).

197855508745 is a wasteful number, since it uses less digits than its factorization.

197855508745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261032.

The product of its (nonzero) digits is 70560000, while the sum is 64.

The spelling of 197855508745 in words is "one hundred ninety-seven billion, eight hundred fifty-five million, five hundred eight thousand, seven hundred forty-five".