56858242421 has 4 divisors (see below), whose sum is σ = 58818871500. Its totient is φ = 54897613344.

The previous prime is 56858242333. The next prime is 56858242447. The reversal of 56858242421 is 12424285865.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14386803025 + 42471439396 = 119945^2 + 206086^2 .

It is a cyclic number.

It is not a de Polignac number, because 56858242421 - 2¹⁰ = 56858241397 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 (56858242451) 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, 980314496 + ... + 980314553.

It is an arithmetic number, because the mean of its divisors is an integer number (14704717875).

Almost surely, 2^56858242421 is an apocalyptic number.

It is an amenable number.

56858242421 is a deficient number, since it is larger than the sum of its proper divisors (1960629079).

56858242421 is a wasteful number, since it uses less digits than its factorization.

56858242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960629078.

The product of its digits is 1228800, while the sum is 47.

The spelling of 56858242421 in words is "fifty-six billion, eight hundred fifty-eight million, two hundred forty-two thousand, four hundred twenty-one".