27744481820 has 48 divisors (see below), whose sum is σ = 65277944928. Its totient is φ = 9816226560.

The previous prime is 27744481819. The next prime is 27744481823. The reversal of 27744481820 is 2818444772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27744481823) 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, 1696067 + ... + 1712346.

It is an arithmetic number, because the mean of its divisors is an integer number (1359957186).

Almost surely, 2^27744481820 is an apocalyptic number.

27744481820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27744481820 is an abundant number, since it is smaller than the sum of its proper divisors (37533463108).

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

27744481820 is a wasteful number, since it uses less digits than its factorization.

27744481820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3408470 (or 3408468 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 47.

The spelling of 27744481820 in words is "twenty-seven billion, seven hundred forty-four million, four hundred eighty-one thousand, eight hundred twenty".