11555505546451 has 4 divisors (see below), whose sum is σ = 11555744933304. Its totient is φ = 11555266159600.

The previous prime is 11555505546427. The next prime is 11555505546491. The reversal of 11555505546451 is 15464550555511.

11555505546451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11555505546451 - 2⁷ = 11555505546323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11555505546401) 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, 119621005 + ... + 119717566.

It is an arithmetic number, because the mean of its divisors is an integer number (2888936233326).

Almost surely, 2^{11555505546451} is an apocalyptic number.

11555505546451 is a deficient number, since it is larger than the sum of its proper divisors (239386853).

11555505546451 is an equidigital number, since it uses as much as digits as its factorization.

11555505546451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239386852.

The product of its (nonzero) digits is 7500000, while the sum is 52.

The spelling of 11555505546451 in words is "eleven trillion, five hundred fifty-five billion, five hundred five million, five hundred forty-six thousand, four hundred fifty-one".