197982478407 has 48 divisors (see below), whose sum is σ = 308777736960. Its totient is φ = 112507008768.

The previous prime is 197982478367. The next prime is 197982478409. The reversal of 197982478407 is 704874289791.

It is not a de Polignac number, because 197982478407 - 2⁷ = 197982478279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197982478409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23927023 + ... + 23935295.

It is an arithmetic number, because the mean of its divisors is an integer number (6432869520).

Almost surely, 2^197982478407 is an apocalyptic number.

197982478407 is a deficient number, since it is larger than the sum of its proper divisors (110795258553).

197982478407 is a wasteful number, since it uses less digits than its factorization.

197982478407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172 (or 9165 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 66.

The spelling of 197982478407 in words is "one hundred ninety-seven billion, nine hundred eighty-two million, four hundred seventy-eight thousand, four hundred seven".