27629220861 has 96 divisors (see below), whose sum is σ = 47605708800. Its totient is φ = 15260106240.

The previous prime is 27629220803. The next prime is 27629220959. The reversal of 27629220861 is 16802292672.

It is not a de Polignac number, because 27629220861 - 2¹³ = 27629212669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27629220061) 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 95 ways as a sum of consecutive naturals, for example, 5213365 + ... + 5218661.

It is an arithmetic number, because the mean of its divisors is an integer number (495892800).

Almost surely, 2^27629220861 is an apocalyptic number.

It is an amenable number.

27629220861 is a deficient number, since it is larger than the sum of its proper divisors (19976487939).

27629220861 is a wasteful number, since it uses less digits than its factorization.

27629220861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439 (or 5436 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 27629220861 in words is "twenty-seven billion, six hundred twenty-nine million, two hundred twenty thousand, eight hundred sixty-one".