1601670918197 has 4 divisors (see below), whose sum is σ = 1830481049376. Its totient is φ = 1372860787020.

The previous prime is 1601670918173. The next prime is 1601670918209. The reversal of 1601670918197 is 7918190761061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601670918197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601670948197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114405065579 + ... + 114405065592.

It is an arithmetic number, because the mean of its divisors is an integer number (457620262344).

Almost surely, 2^{1601670918197} is an apocalyptic number.

It is an amenable number.

1601670918197 is a deficient number, since it is larger than the sum of its proper divisors (228810131179).

1601670918197 is an equidigital number, since it uses as much as digits as its factorization.

1601670918197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228810131178.

The product of its (nonzero) digits is 1143072, while the sum is 56.

The spelling of 1601670918197 in words is "one trillion, six hundred one billion, six hundred seventy million, nine hundred eighteen thousand, one hundred ninety-seven".