63769949977 has 2 divisors, whose sum is σ = 63769949978. Its totient is φ = 63769949976.

The previous prime is 63769949951. The next prime is 63769949989. The reversal of 63769949977 is 77994996736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44765673241 + 19004276736 = 211579^2 + 137856^2 .

It is a cyclic number.

It is not a de Polignac number, because 63769949977 - 2¹¹ = 63769947929 is a prime.

It is not a weakly prime, because it can be changed into another prime (63769949377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31884974988 + 31884974989.

It is an arithmetic number, because the mean of its divisors is an integer number (31884974989).

Almost surely, 2^63769949977 is an apocalyptic number.

It is an amenable number.

63769949977 is a deficient number, since it is larger than the sum of its proper divisors (1).

63769949977 is an equidigital number, since it uses as much as digits as its factorization.

63769949977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972182736, while the sum is 76.

The spelling of 63769949977 in words is "sixty-three billion, seven hundred sixty-nine million, nine hundred forty-nine thousand, nine hundred seventy-seven".