63485777731 has 2 divisors, whose sum is σ = 63485777732. Its totient is φ = 63485777730.

The previous prime is 63485777713. The next prime is 63485777743. The reversal of 63485777731 is 13777758436.

It is a happy number.

Together with previous prime (63485777713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63485777731 - 2⁹ = 63485777219 is a prime.

It is a super-2 number, since 2×63485777731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63485771731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31742888865 + 31742888866.

It is an arithmetic number, because the mean of its divisors is an integer number (31742888866).

Almost surely, 2^63485777731 is an apocalyptic number.

63485777731 is a deficient number, since it is larger than the sum of its proper divisors (1).

63485777731 is an equidigital number, since it uses as much as digits as its factorization.

63485777731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20744640, while the sum is 58.

The spelling of 63485777731 in words is "sixty-three billion, four hundred eighty-five million, seven hundred seventy-seven thousand, seven hundred thirty-one".