197972387424 has 72 divisors (see below), whose sum is σ = 643410265680. Its totient is φ = 56563538688.

The previous prime is 197972387399. The next prime is 197972387453. The reversal of 197972387424 is 424783279791.

197972387424 is a `hidden beast` number, since 1 + 97 + 97 + 2 + 38 + 7 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49098279 + ... + 49102310.

It is an arithmetic number, because the mean of its divisors is an integer number (8936253690).

Almost surely, 2^197972387424 is an apocalyptic number.

197972387424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

197972387424 is an abundant number, since it is smaller than the sum of its proper divisors (445437878256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197972387424 is a wasteful number, since it uses less digits than its factorization.

197972387424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98200612 (or 98200601 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The spelling of 197972387424 in words is "one hundred ninety-seven billion, nine hundred seventy-two million, three hundred eighty-seven thousand, four hundred twenty-four".