27823472477 has 2 divisors, whose sum is σ = 27823472478. Its totient is φ = 27823472476.

The previous prime is 27823472447. The next prime is 27823472483. The reversal of 27823472477 is 77427432872.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20363004601 + 7460467876 = 142699^2 + 86374^2 .

It is a cyclic number.

It is not a de Polignac number, because 27823472477 - 2¹⁰ = 27823471453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27823472447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13911736238 + 13911736239.

It is an arithmetic number, because the mean of its divisors is an integer number (13911736239).

Almost surely, 2^27823472477 is an apocalyptic number.

It is an amenable number.

27823472477 is a deficient number, since it is larger than the sum of its proper divisors (1).

27823472477 is an equidigital number, since it uses as much as digits as its factorization.

27823472477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7375872, while the sum is 53.

The spelling of 27823472477 in words is "twenty-seven billion, eight hundred twenty-three million, four hundred seventy-two thousand, four hundred seventy-seven".