27821475057 has 4 divisors (see below), whose sum is σ = 37095300080. Its totient is φ = 18547650036.

The previous prime is 27821475013. The next prime is 27821475079. The reversal of 27821475057 is 75057412872.

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 27821475057 - 2⁷ = 27821474929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27821474997 and 27821475015.

It is not an unprimeable number, because it can be changed into a prime (27821425057) 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, 4636912507 + ... + 4636912512.

It is an arithmetic number, because the mean of its divisors is an integer number (9273825020).

Almost surely, 2^27821475057 is an apocalyptic number.

It is an amenable number.

27821475057 is a deficient number, since it is larger than the sum of its proper divisors (9273825023).

27821475057 is an equidigital number, since it uses as much as digits as its factorization.

27821475057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9273825022.

The product of its (nonzero) digits is 1097600, while the sum is 48.

The spelling of 27821475057 in words is "twenty-seven billion, eight hundred twenty-one million, four hundred seventy-five thousand, fifty-seven".