197655857069 has 4 divisors (see below), whose sum is σ = 215624571360. Its totient is φ = 179687142780.

The previous prime is 197655857053. The next prime is 197655857071. The reversal of 197655857069 is 960758556791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197655857069 - 2⁴ = 197655857053 is a prime.

It is a super-2 number, since 2×197655857069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197655857039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8984357129 + ... + 8984357150.

It is an arithmetic number, because the mean of its divisors is an integer number (53906142840).

Almost surely, 2^197655857069 is an apocalyptic number.

It is an amenable number.

197655857069 is a deficient number, since it is larger than the sum of its proper divisors (17968714291).

197655857069 is a wasteful number, since it uses less digits than its factorization.

197655857069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17968714290.

The product of its (nonzero) digits is 142884000, while the sum is 68.

The spelling of 197655857069 in words is "one hundred ninety-seven billion, six hundred fifty-five million, eight hundred fifty-seven thousand, sixty-nine".