56015666550551 has 4 divisors (see below), whose sum is σ = 56015726486832. Its totient is φ = 56015606614272.

The previous prime is 56015666550521. The next prime is 56015666550581. The reversal of 56015666550551 is 15505566651065.

56015666550551 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 an interprime number because it is at equal distance from previous prime (56015666550521) and next prime (56015666550581).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56015666550551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56015666550511) 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, 28543691 + ... + 30442956.

It is an arithmetic number, because the mean of its divisors is an integer number (14003931621708).

Almost surely, 2^{56015666550551} is an apocalyptic number.

56015666550551 is a deficient number, since it is larger than the sum of its proper divisors (59936281).

56015666550551 is an equidigital number, since it uses as much as digits as its factorization.

56015666550551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59936280.

The product of its (nonzero) digits is 20250000, while the sum is 56.

The spelling of 56015666550551 in words is "fifty-six trillion, fifteen billion, six hundred sixty-six million, five hundred fifty thousand, five hundred fifty-one".