27521291949 has 4 divisors (see below), whose sum is σ = 36695055936. Its totient is φ = 18347527964.

The previous prime is 27521291929. The next prime is 27521291971. The reversal of 27521291949 is 94919212572.

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 27521291949 - 2¹² = 27521287853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27521291929) 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, 4586881989 + ... + 4586881994.

It is an arithmetic number, because the mean of its divisors is an integer number (9173763984).

Almost surely, 2^27521291949 is an apocalyptic number.

It is an amenable number.

27521291949 is a deficient number, since it is larger than the sum of its proper divisors (9173763987).

27521291949 is an equidigital number, since it uses as much as digits as its factorization.

27521291949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173763986.

The product of its digits is 816480, while the sum is 51.

The spelling of 27521291949 in words is "twenty-seven billion, five hundred twenty-one million, two hundred ninety-one thousand, nine hundred forty-nine".