27472705921 has 8 divisors (see below), whose sum is σ = 27800560800. Its totient is φ = 27145277280.

The previous prime is 27472705919. The next prime is 27472705943. The reversal of 27472705921 is 12950727472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27472705921 - 2¹ = 27472705919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27472700921) 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 7 ways as a sum of consecutive naturals, for example, 24066 + ... + 235636.

It is an arithmetic number, because the mean of its divisors is an integer number (3475070100).

Almost surely, 2^27472705921 is an apocalyptic number.

It is an amenable number.

27472705921 is a deficient number, since it is larger than the sum of its proper divisors (327854879).

27472705921 is a wasteful number, since it uses less digits than its factorization.

27472705921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213119.

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 27472705921 in words is "twenty-seven billion, four hundred seventy-two million, seven hundred five thousand, nine hundred twenty-one".