27640032506 has 16 divisors (see below), whose sum is σ = 42460174080. Its totient is φ = 13488280080.

The previous prime is 27640032503. The next prime is 27640032509. The reversal of 27640032506 is 60523004672.

It is an interprime number because it is at equal distance from previous prime (27640032503) and next prime (27640032509).

It is not an unprimeable number, because it can be changed into a prime (27640032503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375785 + ... + 443276.

It is an arithmetic number, because the mean of its divisors is an integer number (2653760880).

Almost surely, 2^27640032506 is an apocalyptic number.

27640032506 is a deficient number, since it is larger than the sum of its proper divisors (14820141574).

27640032506 is a wasteful number, since it uses less digits than its factorization.

27640032506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819469.

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 27640032506 in words is "twenty-seven billion, six hundred forty million, thirty-two thousand, five hundred six".