63742509977 has 2 divisors, whose sum is σ = 63742509978. Its totient is φ = 63742509976.

The previous prime is 63742509967. The next prime is 63742509989. The reversal of 63742509977 is 77990524736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62988952576 + 753557401 = 250976^2 + 27451^2 .

It is a cyclic number.

It is not a de Polignac number, because 63742509977 - 2⁶ = 63742509913 is a prime.

It is not a weakly prime, because it can be changed into another prime (63742509937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31871254988 + 31871254989.

It is an arithmetic number, because the mean of its divisors is an integer number (31871254989).

Almost surely, 2^63742509977 is an apocalyptic number.

It is an amenable number.

63742509977 is a deficient number, since it is larger than the sum of its proper divisors (1).

63742509977 is an equidigital number, since it uses as much as digits as its factorization.

63742509977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20003760, while the sum is 59.

The spelling of 63742509977 in words is "sixty-three billion, seven hundred forty-two million, five hundred nine thousand, nine hundred seventy-seven".