136129267849 has 3 divisors (see below), whose sum is σ = 136129636807. Its totient is φ = 136128898892.

The previous prime is 136129267829. The next prime is 136129267891. The reversal of 136129267849 is 948762921631.

The square root of 136129267849 is 368957.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5036031225 + 131093236624 = 70965^2 + 362068^2 .

It is not a de Polignac number, because 136129267849 - 2¹¹ = 136129265801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136129267793 and 136129267802.

It is not an unprimeable number, because it can be changed into a prime (136129267829) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 184479 + ... + 553435.

Almost surely, 2^136129267849 is an apocalyptic number.

136129267849 is the 368957-th square number.

136129267849 is the 184479-th centered octagonal number.

It is an amenable number.

136129267849 is a deficient number, since it is larger than the sum of its proper divisors (368958).

136129267849 is an frugal number, since it uses more digits than its factorization.

136129267849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737914 (or 368957 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The spelling of 136129267849 in words is "one hundred thirty-six billion, one hundred twenty-nine million, two hundred sixty-seven thousand, eight hundred forty-nine".