27421721734644 has 36 divisors (see below), whose sum is σ = 69335638742916. Its totient is φ = 9137986670208.

The previous prime is 27421721734607. The next prime is 27421721734651. The reversal of 27421721734644 is 44643712712472.

27421721734644 is a `hidden beast` number, since 2 + 7 + 4 + 2 + 1 + 7 + 2 + 173 + 464 + 4 = 666.

27421721734644 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23577220387044 + 3844501347600 = 4855638^2 + 1960740^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107672769 + ... + 107927144.

It is an arithmetic number, because the mean of its divisors is an integer number (1925989965081).

Almost surely, 2^{27421721734644} is an apocalyptic number.

It is an amenable number.

27421721734644 is an abundant number, since it is smaller than the sum of its proper divisors (41913917008272).

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

27421721734644 is a wasteful number, since it uses less digits than its factorization.

27421721734644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215603456 (or 215603451 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 54.

The spelling of 27421721734644 in words is "twenty-seven trillion, four hundred twenty-one billion, seven hundred twenty-one million, seven hundred thirty-four thousand, six hundred forty-four".