268202220136 has 8 divisors (see below), whose sum is σ = 502879162770. Its totient is φ = 134101110064.

The previous prime is 268202220131. The next prime is 268202220157. The reversal of 268202220136 is 631022202862.

It can be written as a sum of positive squares in only one way, i.e., 216625084900 + 51577135236 = 465430^2 + 227106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (268202220131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16762638751 + ... + 16762638766.

Almost surely, 2^268202220136 is an apocalyptic number.

It is an amenable number.

268202220136 is a deficient number, since it is larger than the sum of its proper divisors (234676942634).

268202220136 is a wasteful number, since it uses less digits than its factorization.

268202220136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33525277523 (or 33525277519 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 268202220136 its reverse (631022202862), we get a palindrome (899224422998).

The spelling of 268202220136 in words is "two hundred sixty-eight billion, two hundred two million, two hundred twenty thousand, one hundred thirty-six".