197085894545 has 8 divisors (see below), whose sum is σ = 237423320424. Its totient is φ = 157055217664.

The previous prime is 197085894539. The next prime is 197085894647. The reversal of 197085894545 is 545498580791.

It can be written as a sum of positive squares in 4 ways, for example, as 32541273664 + 164544620881 = 180392^2 + 405641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197085894545 - 2⁴ = 197085894529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76685834 + ... + 76688403.

It is an arithmetic number, because the mean of its divisors is an integer number (29677915053).

Almost surely, 2^197085894545 is an apocalyptic number.

It is an amenable number.

197085894545 is a deficient number, since it is larger than the sum of its proper divisors (40337425879).

197085894545 is a wasteful number, since it uses less digits than its factorization.

197085894545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153374499.

The product of its (nonzero) digits is 72576000, while the sum is 65.

The spelling of 197085894545 in words is "one hundred ninety-seven billion, eighty-five million, eight hundred ninety-four thousand, five hundred forty-five".