1601103721606 has 4 divisors (see below), whose sum is σ = 2401655582412. Its totient is φ = 800551860802.

The previous prime is 1601103721597. The next prime is 1601103721631. The reversal of 1601103721606 is 6061273011061.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400275930400 + ... + 400275930403.

It is an arithmetic number, because the mean of its divisors is an integer number (600413895603).

Almost surely, 2^{1601103721606} is an apocalyptic number.

1601103721606 is a deficient number, since it is larger than the sum of its proper divisors (800551860806).

1601103721606 is an equidigital number, since it uses as much as digits as its factorization.

1601103721606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800551860805.

The product of its (nonzero) digits is 9072, while the sum is 34.

Adding to 1601103721606 its reverse (6061273011061), we get a palindrome (7662376732667).

The spelling of 1601103721606 in words is "one trillion, six hundred one billion, one hundred three million, seven hundred twenty-one thousand, six hundred six".