136917020529 has 9 divisors (see below), whose sum is σ = 197770633099. Its totient is φ = 91277273640.

The previous prime is 136917020509. The next prime is 136917020543. The reversal of 136917020529 is 925020719631.

It is a happy number.

The square root of 136917020529 is 370023.

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

136917020529 is a `hidden beast` number, since 1 + 36 + 9 + 1 + 70 + 20 + 529 = 666.

It can be written as a sum of positive squares in only one way, i.e., 133208210529 + 3708810000 = 364977^2 + 60900^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 136917020529 - 2⁹ = 136917020017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136917020509) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1048399 + ... + 1171739.

Almost surely, 2^136917020529 is an apocalyptic number.

136917020529 is the 370023-rd square number.

136917020529 is the 185012-nd centered octagonal number.

It is an amenable number.

136917020529 is a deficient number, since it is larger than the sum of its proper divisors (60853612570).

136917020529 is an frugal number, since it uses more digits than its factorization.

136917020529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246688 (or 123344 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 136917020529 in words is "one hundred thirty-six billion, nine hundred seventeen million, twenty thousand, five hundred twenty-nine".