27747870545 has 16 divisors (see below), whose sum is σ = 34140216000. Its totient is φ = 21638522304.

The previous prime is 27747870533. The next prime is 27747870547. The reversal of 27747870545 is 54507874772.

It is a cyclic number.

It is not a de Polignac number, because 27747870545 - 2¹⁶ = 27747805009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27747870547) 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, 22034 + ... + 236603.

It is an arithmetic number, because the mean of its divisors is an integer number (2133763500).

Almost surely, 2^27747870545 is an apocalyptic number.

It is an amenable number.

27747870545 is a deficient number, since it is larger than the sum of its proper divisors (6392345455).

27747870545 is a wasteful number, since it uses less digits than its factorization.

27747870545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259184.

The product of its (nonzero) digits is 15366400, while the sum is 56.

The spelling of 27747870545 in words is "twenty-seven billion, seven hundred forty-seven million, eight hundred seventy thousand, five hundred forty-five".