27800546445 has 48 divisors (see below), whose sum is σ = 57970074240. Its totient is φ = 12039933312.

The previous prime is 27800546441. The next prime is 27800546447. The reversal of 27800546445 is 54464500872.

27800546445 is a `hidden beast` number, since 27 + 80 + 0 + 546 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 27800546445 - 2² = 27800546441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27800546445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27800546441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2316534 + ... + 2328503.

It is an arithmetic number, because the mean of its divisors is an integer number (1207709880).

Almost surely, 2^27800546445 is an apocalyptic number.

It is an amenable number.

27800546445 is an abundant number, since it is smaller than the sum of its proper divisors (30169527795).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27800546445 is a wasteful number, since it uses less digits than its factorization.

27800546445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645074 (or 4645071 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 45.

The spelling of 27800546445 in words is "twenty-seven billion, eight hundred million, five hundred forty-six thousand, four hundred forty-five".