27777161047 has 8 divisors (see below), whose sum is σ = 27840195072. Its totient is φ = 27714199800.

The previous prime is 27777161029. The next prime is 27777161057. The reversal of 27777161047 is 74016177772.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27777161047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27777161057) 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 7 ways as a sum of consecutive naturals, for example, 785722 + ... + 820312.

It is an arithmetic number, because the mean of its divisors is an integer number (3480024384).

Almost surely, 2^27777161047 is an apocalyptic number.

27777161047 is a deficient number, since it is larger than the sum of its proper divisors (63034025).

27777161047 is an equidigital number, since it uses as much as digits as its factorization.

27777161047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36389.

The product of its (nonzero) digits is 806736, while the sum is 49.

The spelling of 27777161047 in words is "twenty-seven billion, seven hundred seventy-seven million, one hundred sixty-one thousand, forty-seven".