197668677942 has 16 divisors (see below), whose sum is σ = 439263728880. Its totient is φ = 65889559296.

The previous prime is 197668677911. The next prime is 197668677949. The reversal of 197668677942 is 249776866791.

197668677942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197668677949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830265483 + ... + 1830265590.

It is an arithmetic number, because the mean of its divisors is an integer number (27453983055).

Almost surely, 2^197668677942 is an apocalyptic number.

197668677942 is an abundant number, since it is smaller than the sum of its proper divisors (241595050938).

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

197668677942 is a wasteful number, since it uses less digits than its factorization.

197668677942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660531084 (or 3660531078 counting only the distinct ones).

The product of its digits is 384072192, while the sum is 72.

The spelling of 197668677942 in words is "one hundred ninety-seven billion, six hundred sixty-eight million, six hundred seventy-seven thousand, nine hundred forty-two".