63038139781 has 2 divisors, whose sum is σ = 63038139782. Its totient is φ = 63038139780.

The previous prime is 63038139757. The next prime is 63038139809. The reversal of 63038139781 is 18793183036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62367070756 + 671069025 = 249734^2 + 25905^2 .

It is a cyclic number.

It is not a de Polignac number, because 63038139781 - 2²³ = 63029751173 is a prime.

It is a super-2 number, since 2×63038139781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63038139701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31519069890 + 31519069891.

It is an arithmetic number, because the mean of its divisors is an integer number (31519069891).

Almost surely, 2^63038139781 is an apocalyptic number.

It is an amenable number.

63038139781 is a deficient number, since it is larger than the sum of its proper divisors (1).

63038139781 is an equidigital number, since it uses as much as digits as its factorization.

63038139781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 63038139781 in words is "sixty-three billion, thirty-eight million, one hundred thirty-nine thousand, seven hundred eighty-one".