27742121764 has 24 divisors (see below), whose sum is σ = 56022931328. Its totient is φ = 11774047680.

The previous prime is 27742121731. The next prime is 27742121777. The reversal of 27742121764 is 46712124772.

It is a self number, because there is not a number n which added to its sum of digits gives 27742121764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4806777 + ... + 4812544.

Almost surely, 2^27742121764 is an apocalyptic number.

It is an amenable number.

27742121764 is an abundant number, since it is smaller than the sum of its proper divisors (28280809564).

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

27742121764 is a wasteful number, since it uses less digits than its factorization.

27742121764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9619435 (or 9619433 counting only the distinct ones).

The product of its digits is 263424, while the sum is 43.

The spelling of 27742121764 in words is "twenty-seven billion, seven hundred forty-two million, one hundred twenty-one thousand, seven hundred sixty-four".