197155701427 has 16 divisors (see below), whose sum is σ = 211388284800. Its totient is φ = 183513133440.

The previous prime is 197155701293. The next prime is 197155701433. The reversal of 197155701427 is 724107551791.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 197155701427 - 2¹⁵ = 197155668659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197155701487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 725899 + ... + 959812.

It is an arithmetic number, because the mean of its divisors is an integer number (13211767800).

Almost surely, 2^197155701427 is an apocalyptic number.

197155701427 is a deficient number, since it is larger than the sum of its proper divisors (14232583373).

197155701427 is a wasteful number, since it uses less digits than its factorization.

197155701427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685886.

The product of its (nonzero) digits is 617400, while the sum is 49.

The spelling of 197155701427 in words is "one hundred ninety-seven billion, one hundred fifty-five million, seven hundred one thousand, four hundred twenty-seven".