197151621488641 has 8 divisors (see below), whose sum is σ = 199530973252800. Its totient is φ = 194772365701392.

The previous prime is 197151621488531. The next prime is 197151621488699. The reversal of 197151621488641 is 146884126151791.

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 197151621488641 - 2⁷ = 197151621488513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197151621486641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19856845 + ... + 28081978.

It is an arithmetic number, because the mean of its divisors is an integer number (24941371656600).

Almost surely, 2^{197151621488641} is an apocalyptic number.

It is an amenable number.

197151621488641 is a deficient number, since it is larger than the sum of its proper divisors (2379351764159).

197151621488641 is an equidigital number, since it uses as much as digits as its factorization.

197151621488641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47988455.

The product of its digits is 23224320, while the sum is 64.

The spelling of 197151621488641 in words is "one hundred ninety-seven trillion, one hundred fifty-one billion, six hundred twenty-one million, four hundred eighty-eight thousand, six hundred forty-one".