27752311821 has 8 divisors (see below), whose sum is σ = 39849473440. Its totient is φ = 17078345712.

The previous prime is 27752311817. The next prime is 27752311823. The reversal of 27752311821 is 12811325772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27752311821 - 2² = 27752311817 is a prime.

It is a super-2 number, since 2×27752311821² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 711597739 = 27752311821 / (2 + 7 + 7 + 5 + 2 + 3 + 1 + 1 + 8 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27752311821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27752311823) 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 7 ways as a sum of consecutive naturals, for example, 355798831 + ... + 355798908.

It is an arithmetic number, because the mean of its divisors is an integer number (4981184180).

Almost surely, 2^27752311821 is an apocalyptic number.

It is an amenable number.

27752311821 is a deficient number, since it is larger than the sum of its proper divisors (12097161619).

27752311821 is a wasteful number, since it uses less digits than its factorization.

27752311821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711597755.

The product of its digits is 47040, while the sum is 39.

The spelling of 27752311821 in words is "twenty-seven billion, seven hundred fifty-two million, three hundred eleven thousand, eight hundred twenty-one".