27640003673 has 16 divisors (see below), whose sum is σ = 29472512256. Its totient is φ = 25831104000.

The previous prime is 27640003663. The next prime is 27640003679. The reversal of 27640003673 is 37630004672.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27640003673 - 2⁶ = 27640003609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27640003679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389548 + ... + 1409298.

It is an arithmetic number, because the mean of its divisors is an integer number (1842032016).

Almost surely, 2^27640003673 is an apocalyptic number.

It is an amenable number.

27640003673 is a deficient number, since it is larger than the sum of its proper divisors (1832508583).

27640003673 is a wasteful number, since it uses less digits than its factorization.

27640003673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20344.

The product of its (nonzero) digits is 127008, while the sum is 38.

Subtracting 27640003673 from its reverse (37630004672), we obtain a palindrome (9990000999).

The spelling of 27640003673 in words is "twenty-seven billion, six hundred forty million, three thousand, six hundred seventy-three".