1997909934267 has 64 divisors (see below), whose sum is σ = 3043183001600. Its totient is φ = 1156975488000.

The previous prime is 1997909934247. The next prime is 1997909934281. The reversal of 1997909934267 is 7624399097991.

It is not a de Polignac number, because 1997909934267 - 2¹¹ = 1997909932219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1997909934217) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80551734 + ... + 80576532.

It is an arithmetic number, because the mean of its divisors is an integer number (47549734400).

Almost surely, 2^{1997909934267} is an apocalyptic number.

1997909934267 is a deficient number, since it is larger than the sum of its proper divisors (1045273067333).

1997909934267 is a wasteful number, since it uses less digits than its factorization.

1997909934267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26684.

The product of its (nonzero) digits is 416649744, while the sum is 75.

The spelling of 1997909934267 in words is "one trillion, nine hundred ninety-seven billion, nine hundred nine million, nine hundred thirty-four thousand, two hundred sixty-seven".