26977820477 has 2 divisors, whose sum is σ = 26977820478. Its totient is φ = 26977820476.

The previous prime is 26977820431. The next prime is 26977820483. The reversal of 26977820477 is 77402877962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24392504761 + 2585315716 = 156181^2 + 50846^2 .

It is a cyclic number.

It is not a de Polignac number, because 26977820477 - 2¹⁴ = 26977804093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26977820417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13488910238 + 13488910239.

It is an arithmetic number, because the mean of its divisors is an integer number (13488910239).

Almost surely, 2^26977820477 is an apocalyptic number.

It is an amenable number.

26977820477 is a deficient number, since it is larger than the sum of its proper divisors (1).

26977820477 is an equidigital number, since it uses as much as digits as its factorization.

26977820477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16595712, while the sum is 59.

The spelling of 26977820477 in words is "twenty-six billion, nine hundred seventy-seven million, eight hundred twenty thousand, four hundred seventy-seven".