136645400221503 has 4 divisors (see below), whose sum is σ = 182193866962008. Its totient is φ = 91096933481000.

The previous prime is 136645400221457. The next prime is 136645400221523. The reversal of 136645400221503 is 305122004546631.

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

It is a cyclic number.

It is not a de Polignac number, because 136645400221503 - 2⁶ = 136645400221439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136645400221523) 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, 22774233370248 + ... + 22774233370253.

It is an arithmetic number, because the mean of its divisors is an integer number (45548466740502).

Almost surely, 2^{136645400221503} is an apocalyptic number.

136645400221503 is a deficient number, since it is larger than the sum of its proper divisors (45548466740505).

136645400221503 is an equidigital number, since it uses as much as digits as its factorization.

136645400221503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45548466740504.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 136645400221503 in words is "one hundred thirty-six trillion, six hundred forty-five billion, four hundred million, two hundred twenty-one thousand, five hundred three".