63461777761 has 2 divisors, whose sum is σ = 63461777762. Its totient is φ = 63461777760.

The previous prime is 63461777747. The next prime is 63461777791. The reversal of 63461777761 is 16777716436.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58242582225 + 5219195536 = 241335^2 + 72244^2 .

It is a cyclic number.

It is not a de Polignac number, because 63461777761 - 2³¹ = 61314294113 is a prime.

It is not a weakly prime, because it can be changed into another prime (63461777711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31730888880 + 31730888881.

It is an arithmetic number, because the mean of its divisors is an integer number (31730888881).

Almost surely, 2^63461777761 is an apocalyptic number.

It is an amenable number.

63461777761 is a deficient number, since it is larger than the sum of its proper divisors (1).

63461777761 is an equidigital number, since it uses as much as digits as its factorization.

63461777761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6223392, while the sum is 55.

The spelling of 63461777761 in words is "sixty-three billion, four hundred sixty-one million, seven hundred seventy-seven thousand, seven hundred sixty-one".