136623546256551 has 4 divisors (see below), whose sum is σ = 182164728342072. Its totient is φ = 91082364171032.

The previous prime is 136623546256531. The next prime is 136623546256559. The reversal of 136623546256551 is 155652645326631.

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 136623546256551 - 2⁹ = 136623546256039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136623546256559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22770591042756 + ... + 22770591042761.

It is an arithmetic number, because the mean of its divisors is an integer number (45541182085518).

Almost surely, 2^{136623546256551} is an apocalyptic number.

136623546256551 is a deficient number, since it is larger than the sum of its proper divisors (45541182085521).

136623546256551 is an equidigital number, since it uses as much as digits as its factorization.

136623546256551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45541182085520.

The product of its digits is 116640000, while the sum is 60.

The spelling of 136623546256551 in words is "one hundred thirty-six trillion, six hundred twenty-three billion, five hundred forty-six million, two hundred fifty-six thousand, five hundred fifty-one".