1597669781166 has 24 divisors (see below), whose sum is σ = 3589825929144. Its totient is φ = 532556593560.

The previous prime is 1597669781153. The next prime is 1597669781177. The reversal of 1597669781166 is 6611879667951.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1597669781094 and 1597669781103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1643692705 + ... + 1643693676.

It is an arithmetic number, because the mean of its divisors is an integer number (149576080381).

Almost surely, 2^{1597669781166} is an apocalyptic number.

1597669781166 is an abundant number, since it is smaller than the sum of its proper divisors (1992156147978).

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

1597669781166 is an equidigital number, since it uses as much as digits as its factorization.

1597669781166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287386398 (or 3287386386 counting only the distinct ones).

The product of its digits is 205752960, while the sum is 72.

The spelling of 1597669781166 in words is "one trillion, five hundred ninety-seven billion, six hundred sixty-nine million, seven hundred eighty-one thousand, one hundred sixty-six".