27764456641 has 4 divisors (see below), whose sum is σ = 27774885312. Its totient is φ = 27754027972.

The previous prime is 27764456611. The next prime is 27764456659. The reversal of 27764456641 is 14665446772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27764456641 - 2⁵ = 27764456609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27764456611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5210341 + ... + 5215666.

It is an arithmetic number, because the mean of its divisors is an integer number (6943721328).

Almost surely, 2^27764456641 is an apocalyptic number.

It is an amenable number.

27764456641 is a deficient number, since it is larger than the sum of its proper divisors (10428671).

27764456641 is a wasteful number, since it uses less digits than its factorization.

27764456641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10428670.

The product of its digits is 6773760, while the sum is 52.

The spelling of 27764456641 in words is "twenty-seven billion, seven hundred sixty-four million, four hundred fifty-six thousand, six hundred forty-one".