27999570097445 has 4 divisors (see below), whose sum is σ = 33599484116940. Its totient is φ = 22399656077952.

The previous prime is 27999570097393. The next prime is 27999570097487. The reversal of 27999570097445 is 54479007599972.

It is a Cunningham number, because it is equal to 5291462²+1.

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 10079850314884 + 17919719782561 = 3174878^2 + 4233169^2 .

It is a cyclic number.

It is not a de Polignac number, because 27999570097445 - 2¹² = 27999570093349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2799957009740 + ... + 2799957009749.

It is an arithmetic number, because the mean of its divisors is an integer number (8399871029235).

Almost surely, 2^{27999570097445} is an apocalyptic number.

It is an amenable number.

27999570097445 is a deficient number, since it is larger than the sum of its proper divisors (5599914019495).

27999570097445 is an equidigital number, since it uses as much as digits as its factorization.

27999570097445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599914019494.

The product of its (nonzero) digits is 1800338400, while the sum is 77.

The spelling of 27999570097445 in words is "twenty-seven trillion, nine hundred ninety-nine billion, five hundred seventy million, ninety-seven thousand, four hundred forty-five".