56271727821 has 4 divisors (see below), whose sum is σ = 75028970432. Its totient is φ = 37514485212.

The previous prime is 56271727763. The next prime is 56271727871. The reversal of 56271727821 is 12872717265.

56271727821 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56271727821 - 2¹³ = 56271719629 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 (56271727871) 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, 9378621301 + ... + 9378621306.

It is an arithmetic number, because the mean of its divisors is an integer number (18757242608).

Almost surely, 2^56271727821 is an apocalyptic number.

It is an amenable number.

56271727821 is a deficient number, since it is larger than the sum of its proper divisors (18757242611).

56271727821 is a wasteful number, since it uses less digits than its factorization.

56271727821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18757242610.

The product of its digits is 658560, while the sum is 48.

The spelling of 56271727821 in words is "fifty-six billion, two hundred seventy-one million, seven hundred twenty-seven thousand, eight hundred twenty-one".