197643977153 has 32 divisors (see below), whose sum is σ = 246177964800. Its totient is φ = 154825122816.

The previous prime is 197643977149. The next prime is 197643977183. The reversal of 197643977153 is 351779346791.

It is not a de Polignac number, because 197643977153 - 2² = 197643977149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197643977143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4579925 + ... + 4622877.

It is an arithmetic number, because the mean of its divisors is an integer number (7693061400).

Almost surely, 2^197643977153 is an apocalyptic number.

It is an amenable number.

197643977153 is a deficient number, since it is larger than the sum of its proper divisors (48533987647).

197643977153 is a wasteful number, since it uses less digits than its factorization.

197643977153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44201.

The product of its digits is 30005640, while the sum is 62.

The spelling of 197643977153 in words is "one hundred ninety-seven billion, six hundred forty-three million, nine hundred seventy-seven thousand, one hundred fifty-three".