3657601121 has 4 divisors (see below), whose sum is σ = 3677809044. Its totient is φ = 3637393200.

The previous prime is 3657601117. The next prime is 3657601159. The reversal of 3657601121 is 1211067563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211067563 = 6373 ⋅190031.

It can be written as a sum of positive squares in 2 ways, for example, as 227859025 + 3429742096 = 15095^2 + 58564^2 .

It is a cyclic number.

It is not a de Polignac number, because 3657601121 - 2² = 3657601117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3657601111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10103690 + ... + 10104051.

It is an arithmetic number, because the mean of its divisors is an integer number (919452261).

Almost surely, 2^3657601121 is an apocalyptic number.

It is an amenable number.

3657601121 is a deficient number, since it is larger than the sum of its proper divisors (20207923).

3657601121 is a wasteful number, since it uses less digits than its factorization.

3657601121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20207922.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 3657601121 is about 60478.1044759176. The cubic root of 3657601121 is about 1540.7497784005.

Adding to 3657601121 its reverse (1211067563), we get a palindrome (4868668684).

The spelling of 3657601121 in words is "three billion, six hundred fifty-seven million, six hundred one thousand, one hundred twenty-one".