27972489601 has 16 divisors (see below), whose sum is σ = 32518088064. Its totient is φ = 23567209344.

The previous prime is 27972489551. The next prime is 27972489631. The reversal of 27972489601 is 10698427972.

It is not a de Polignac number, because 27972489601 - 2²³ = 27964100993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27972489631) 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 15 ways as a sum of consecutive naturals, for example, 7740 + ... + 236653.

It is an arithmetic number, because the mean of its divisors is an integer number (2032380504).

Almost surely, 2^27972489601 is an apocalyptic number.

It is an amenable number.

27972489601 is a deficient number, since it is larger than the sum of its proper divisors (4545598463).

27972489601 is a wasteful number, since it uses less digits than its factorization.

27972489601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244680.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 27972489601 in words is "twenty-seven billion, nine hundred seventy-two million, four hundred eighty-nine thousand, six hundred one".