27475345421 has 4 divisors (see below), whose sum is σ = 27598553472. Its totient is φ = 27352137372.

The previous prime is 27475345397. The next prime is 27475345427. The reversal of 27475345421 is 12454357472.

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 a cyclic number.

It is not a de Polignac number, because 27475345421 - 2⁶ = 27475345357 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 (27475345427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61603691 + ... + 61604136.

It is an arithmetic number, because the mean of its divisors is an integer number (6899638368).

Almost surely, 2^27475345421 is an apocalyptic number.

It is an amenable number.

27475345421 is a deficient number, since it is larger than the sum of its proper divisors (123208051).

27475345421 is a wasteful number, since it uses less digits than its factorization.

27475345421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123208050.

The product of its digits is 940800, while the sum is 44.

The spelling of 27475345421 in words is "twenty-seven billion, four hundred seventy-five million, three hundred forty-five thousand, four hundred twenty-one".