161648033121 has 6 divisors (see below), whose sum is σ = 233491603410. Its totient is φ = 107765355408.

The previous prime is 161648033101. The next prime is 161648033143. The reversal of 161648033121 is 121330846161.

161648033121 is a `hidden beast` number, since 1 + 6 + 1 + 648 + 0 + 3 + 3 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110914975521 + 50733057600 = 333039^2 + 225240^2 .

It is not a de Polignac number, because 161648033121 - 2¹⁴ = 161648016737 is a prime.

It is a super-2 number, since 2×161648033121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161648033101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8980446276 + ... + 8980446293.

It is an arithmetic number, because the mean of its divisors is an integer number (38915267235).

Almost surely, 2^161648033121 is an apocalyptic number.

It is an amenable number.

161648033121 is a deficient number, since it is larger than the sum of its proper divisors (71843570289).

161648033121 is a wasteful number, since it uses less digits than its factorization.

161648033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17960892575 (or 17960892572 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 161648033121 its reverse (121330846161), we get a palindrome (282978879282).

The spelling of 161648033121 in words is "one hundred sixty-one billion, six hundred forty-eight million, thirty-three thousand, one hundred twenty-one".