136501332536521 has 4 divisors (see below), whose sum is σ = 138035055374100. Its totient is φ = 134967609698944.

The previous prime is 136501332536501. The next prime is 136501332536581. The reversal of 136501332536521 is 125635233105631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43650281930896 + 92851050605625 = 6606836^2 + 9635925^2 .

It is a cyclic number.

It is not a de Polignac number, because 136501332536521 - 2⁵ = 136501332536489 is a prime.

It is a super-2 number, since 2×136501332536521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136501332536501) 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, 766861418656 + ... + 766861418833.

It is an arithmetic number, because the mean of its divisors is an integer number (34508763843525).

Almost surely, 2^{136501332536521} is an apocalyptic number.

It is an amenable number.

136501332536521 is a deficient number, since it is larger than the sum of its proper divisors (1533722837579).

136501332536521 is an equidigital number, since it uses as much as digits as its factorization.

136501332536521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533722837578.

The product of its (nonzero) digits is 1458000, while the sum is 46.

The spelling of 136501332536521 in words is "one hundred thirty-six trillion, five hundred one billion, three hundred thirty-two million, five hundred thirty-six thousand, five hundred twenty-one".