63872452909 has 2 divisors, whose sum is σ = 63872452910. Its totient is φ = 63872452908.

The previous prime is 63872452877. The next prime is 63872452949. The reversal of 63872452909 is 90925427836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63872452900 + 9 = 252730^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 63872452909 - 2⁵ = 63872452877 is a prime.

It is a super-2 number, since 2×63872452909² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63872452909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63872452949) 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, 31936226454 + 31936226455.

It is an arithmetic number, because the mean of its divisors is an integer number (31936226455).

Almost surely, 2^63872452909 is an apocalyptic number.

It is an amenable number.

63872452909 is a deficient number, since it is larger than the sum of its proper divisors (1).

63872452909 is an equidigital number, since it uses as much as digits as its factorization.

63872452909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 63872452909 in words is "sixty-three billion, eight hundred seventy-two million, four hundred fifty-two thousand, nine hundred nine".