27420661760440 has 64 divisors (see below), whose sum is σ = 67063329617760. Its totient is φ = 10029930032640.

The previous prime is 27420661760381. The next prime is 27420661760441. The reversal of 27420661760440 is 4406716602472.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27420661760441) 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 15 ways as a sum of consecutive naturals, for example, 246355771 + ... + 246467050.

Almost surely, 2^{27420661760440} is an apocalyptic number.

27420661760440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27420661760440 is an abundant number, since it is smaller than the sum of its proper divisors (39642667857320).

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

27420661760440 is a wasteful number, since it uses less digits than its factorization.

27420661760440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492822952 (or 492822948 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 49.

The spelling of 27420661760440 in words is "twenty-seven trillion, four hundred twenty billion, six hundred sixty-one million, seven hundred sixty thousand, four hundred forty".