27712637921 has 8 divisors (see below), whose sum is σ = 28095350304. Its totient is φ = 27330009120.

The previous prime is 27712637917. The next prime is 27712637947. The reversal of 27712637921 is 12973621772.

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 27712637921 - 2² = 27712637917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27712637951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964850 + ... + 993156.

It is an arithmetic number, because the mean of its divisors is an integer number (3511918788).

Almost surely, 2^27712637921 is an apocalyptic number.

It is an amenable number.

27712637921 is a deficient number, since it is larger than the sum of its proper divisors (382712383).

27712637921 is a wasteful number, since it uses less digits than its factorization.

27712637921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41791.

The product of its digits is 444528, while the sum is 47.

The spelling of 27712637921 in words is "twenty-seven billion, seven hundred twelve million, six hundred thirty-seven thousand, nine hundred twenty-one".