63877766377 has 2 divisors, whose sum is σ = 63877766378. Its totient is φ = 63877766376.

The previous prime is 63877766363. The next prime is 63877766431. The reversal of 63877766377 is 77366777836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63582648336 + 295118041 = 252156^2 + 17179^2 .

It is a cyclic number.

It is not a de Polignac number, because 63877766377 - 2¹⁹ = 63877242089 is a prime.

It is a super-2 number, since 2×63877766377² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63877760377) 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 as a sum of consecutive naturals, namely, 31938883188 + 31938883189.

It is an arithmetic number, because the mean of its divisors is an integer number (31938883189).

Almost surely, 2^63877766377 is an apocalyptic number.

It is an amenable number.

63877766377 is a deficient number, since it is larger than the sum of its proper divisors (1).

63877766377 is an equidigital number, since it uses as much as digits as its factorization.

63877766377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 261382464, while the sum is 67.

The spelling of 63877766377 in words is "sixty-three billion, eight hundred seventy-seven million, seven hundred sixty-six thousand, three hundred seventy-seven".