161204262608 has 20 divisors (see below), whose sum is σ = 315425670468. Its totient is φ = 79804089600.

The previous prime is 161204262607. The next prime is 161204262623. The reversal of 161204262608 is 806262402161.

It can be written as a sum of positive squares in 2 ways, for example, as 142273804864 + 18930457744 = 377192^2 + 137588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161204262607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49875941 + ... + 49879172.

Almost surely, 2^161204262608 is an apocalyptic number.

It is an amenable number.

161204262608 is a deficient number, since it is larger than the sum of its proper divisors (154221407860).

161204262608 is a wasteful number, since it uses less digits than its factorization.

161204262608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99755222 (or 99755216 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

Adding to 161204262608 its reverse (806262402161), we get a palindrome (967466664769).

The spelling of 161204262608 in words is "one hundred sixty-one billion, two hundred four million, two hundred sixty-two thousand, six hundred eight".