191603491201 has 4 divisors (see below), whose sum is σ = 192058606804. Its totient is φ = 191148375600.

The previous prime is 191603491193. The next prime is 191603491253. The reversal of 191603491201 is 102194306191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21199651201 + 170403840000 = 145601^2 + 412800^2 .

It is a cyclic number.

It is not a de Polignac number, because 191603491201 - 2³ = 191603491193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191603491291) 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, 227557170 + ... + 227558011.

It is an arithmetic number, because the mean of its divisors is an integer number (48014651701).

Almost surely, 2^191603491201 is an apocalyptic number.

It is an amenable number.

191603491201 is a deficient number, since it is larger than the sum of its proper divisors (455115603).

191603491201 is an equidigital number, since it uses as much as digits as its factorization.

191603491201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455115602.

The product of its (nonzero) digits is 11664, while the sum is 37.

Adding to 191603491201 its reverse (102194306191), we get a palindrome (293797797392).

The spelling of 191603491201 in words is "one hundred ninety-one billion, six hundred three million, four hundred ninety-one thousand, two hundred one".