136520445 has 16 divisors (see below), whose sum is σ = 218911680. Its totient is φ = 72651264.

The previous prime is 136520443. The next prime is 136520507. The reversal of 136520445 is 544025631.

It is not a de Polignac number, because 136520445 - 2¹ = 136520443 is a prime.

It is a super-3 number, since 3×136520445³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136520443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2740 + ... + 16749.

It is an arithmetic number, because the mean of its divisors is an integer number (13681980).

Almost surely, 2^136520445 is an apocalyptic number.

136520445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136520445 is a deficient number, since it is larger than the sum of its proper divisors (82391235).

136520445 is a wasteful number, since it uses less digits than its factorization.

136520445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19964.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 136520445 is about 11684.1963780142. The cubic root of 136520445 is about 514.9114687420.

The spelling of 136520445 in words is "one hundred thirty-six million, five hundred twenty thousand, four hundred forty-five".