27945858477 has 4 divisors (see below), whose sum is σ = 37261144640. Its totient is φ = 18630572316.

The previous prime is 27945858469. The next prime is 27945858547. The reversal of 27945858477 is 77485854972.

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 not a de Polignac number, because 27945858477 - 2³ = 27945858469 is a prime.

It is a super-3 number, since 3×27945858477³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27945858277) 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, 4657643077 + ... + 4657643082.

It is an arithmetic number, because the mean of its divisors is an integer number (9315286160).

Almost surely, 2^27945858477 is an apocalyptic number.

It is an amenable number.

27945858477 is a deficient number, since it is larger than the sum of its proper divisors (9315286163).

27945858477 is an equidigital number, since it uses as much as digits as its factorization.

27945858477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9315286162.

The product of its digits is 158054400, while the sum is 66.

The spelling of 27945858477 in words is "twenty-seven billion, nine hundred forty-five million, eight hundred fifty-eight thousand, four hundred seventy-seven".