65623320161242 has 4 divisors (see below), whose sum is σ = 98434980241866. Its totient is φ = 32811660080620.

The previous prime is 65623320161227. The next prime is 65623320161249. The reversal of 65623320161242 is 24216102332656.

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

It can be written as a sum of positive squares in only one way, i.e., 46690039326121 + 18933280835121 = 6833011^2 + 4351239^2 .

It is not an unprimeable number, because it can be changed into a prime (65623320161249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16405830040309 + ... + 16405830040312.

Almost surely, 2^{65623320161242} is an apocalyptic number.

65623320161242 is a deficient number, since it is larger than the sum of its proper divisors (32811660080624).

65623320161242 is a wasteful number, since it uses less digits than its factorization.

65623320161242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32811660080623.

The product of its (nonzero) digits is 622080, while the sum is 43.

Adding to 65623320161242 its reverse (24216102332656), we get a palindrome (89839422493898).

The spelling of 65623320161242 in words is "sixty-five trillion, six hundred twenty-three billion, three hundred twenty million, one hundred sixty-one thousand, two hundred forty-two".