1997743801167 has 12 divisors (see below), whose sum is σ = 2885642257264. Its totient is φ = 1331823513600.

The previous prime is 1997743801133. The next prime is 1997743801187. The reversal of 1997743801167 is 7611083477991.

1997743801167 is a `hidden beast` number, since 1 + 9 + 97 + 7 + 4 + 380 + 1 + 167 = 666.

It is not a de Polignac number, because 1997743801167 - 2²⁰ = 1997742752591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997743801187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3540303 + ... + 4065615.

Almost surely, 2^{1997743801167} is an apocalyptic number.

1997743801167 is a deficient number, since it is larger than the sum of its proper divisors (887898456097).

1997743801167 is a wasteful number, since it uses less digits than its factorization.

1997743801167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947870 (or 947867 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 63.

The spelling of 1997743801167 in words is "one trillion, nine hundred ninety-seven billion, seven hundred forty-three million, eight hundred one thousand, one hundred sixty-seven".