1601355101 has 8 divisors (see below), whose sum is σ = 1618373208. Its totient is φ = 1584360000.

The previous prime is 1601355097. The next prime is 1601355139. The reversal of 1601355101 is 1015531061.

It can be written as a sum of positive squares in 4 ways, for example, as 812307001 + 789048100 = 28501^2 + 28090^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1601355101 - 2² = 1601355097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601355181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158831 + ... + 168611.

It is an arithmetic number, because the mean of its divisors is an integer number (202296651).

Almost surely, 2^1601355101 is an apocalyptic number.

It is an amenable number.

1601355101 is a deficient number, since it is larger than the sum of its proper divisors (17018107).

1601355101 is a wasteful number, since it uses less digits than its factorization.

1601355101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11503.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 1601355101 is about 40016.9351774970. The cubic root of 1601355101 is about 1169.9371970575.

Adding to 1601355101 its reverse (1015531061), we get a palindrome (2616886162).

The spelling of 1601355101 in words is "one billion, six hundred one million, three hundred fifty-five thousand, one hundred one".