1997474231613 has 24 divisors (see below), whose sum is σ = 3105278416128. Its totient is φ = 1138777750656.

The previous prime is 1997474231581. The next prime is 1997474231653. The reversal of 1997474231613 is 3161324747991.

It is not a de Polignac number, because 1997474231613 - 2⁵ = 1997474231581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997474231653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15627181 + ... + 15754482.

It is an arithmetic number, because the mean of its divisors is an integer number (129386600672).

Almost surely, 2^{1997474231613} is an apocalyptic number.

It is an amenable number.

1997474231613 is a deficient number, since it is larger than the sum of its proper divisors (1107804184515).

1997474231613 is a wasteful number, since it uses less digits than its factorization.

1997474231613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31382113 (or 31382106 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 57.

The spelling of 1997474231613 in words is "one trillion, nine hundred ninety-seven billion, four hundred seventy-four million, two hundred thirty-one thousand, six hundred thirteen".