27956807377 has 4 divisors (see below), whose sum is σ = 29601325476. Its totient is φ = 26312289280.

The previous prime is 27956807371. The next prime is 27956807381. The reversal of 27956807377 is 77370865972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23448490641 + 4508316736 = 153129^2 + 67144^2 .

It is a cyclic number.

It is not a de Polignac number, because 27956807377 - 2²⁷ = 27822589649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27956807371) 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, 822259024 + ... + 822259057.

It is an arithmetic number, because the mean of its divisors is an integer number (7400331369).

Almost surely, 2^27956807377 is an apocalyptic number.

It is an amenable number.

27956807377 is a deficient number, since it is larger than the sum of its proper divisors (1644518099).

27956807377 is a wasteful number, since it uses less digits than its factorization.

27956807377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644518098.

The product of its (nonzero) digits is 31116960, while the sum is 61.

The spelling of 27956807377 in words is "twenty-seven billion, nine hundred fifty-six million, eight hundred seven thousand, three hundred seventy-seven".