27324607981 has 4 divisors (see below), whose sum is σ = 29808663264. Its totient is φ = 24840552700.

The previous prime is 27324607931. The next prime is 27324608009. The reversal of 27324607981 is 18970642372.

It is a happy number.

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 27324607981 - 2²¹ = 27322510829 is a prime.

It is a super-2 number, since 2×27324607981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27324607931) 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, 1242027625 + ... + 1242027646.

It is an arithmetic number, because the mean of its divisors is an integer number (7452165816).

Almost surely, 2^27324607981 is an apocalyptic number.

It is an amenable number.

27324607981 is a deficient number, since it is larger than the sum of its proper divisors (2484055283).

27324607981 is a wasteful number, since it uses less digits than its factorization.

27324607981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484055282.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 27324607981 in words is "twenty-seven billion, three hundred twenty-four million, six hundred seven thousand, nine hundred eighty-one".