136226689921 has 9 divisors (see below), whose sum is σ = 158470787649. Its totient is φ = 116763519684.

The previous prime is 136226689919. The next prime is 136226689927. The reversal of 136226689921 is 129986622631.

The square root of 136226689921 is 369089.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 136226689921 - 2¹ = 136226689919 is a prime.

It is a super-2 number, since 2×136226689921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136226689927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2557260 + ... + 2609986.

Almost surely, 2^136226689921 is an apocalyptic number.

136226689921 is the 369089-th square number.

136226689921 is the 184545-th centered octagonal number.

It is an amenable number.

136226689921 is a deficient number, since it is larger than the sum of its proper divisors (22244097728).

136226689921 is an frugal number, since it uses more digits than its factorization.

136226689921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105468 (or 52734 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 136226689921 in words is "one hundred thirty-six billion, two hundred twenty-six million, six hundred eighty-nine thousand, nine hundred twenty-one".