63878925349 has 2 divisors, whose sum is σ = 63878925350. Its totient is φ = 63878925348.

The previous prime is 63878925301. The next prime is 63878925367. The reversal of 63878925349 is 94352987836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44747056225 + 19131869124 = 211535^2 + 138318^2 .

It is a cyclic number.

It is not a de Polignac number, because 63878925349 - 2³⁵ = 29519186981 is a prime.

It is a super-2 number, since 2×63878925349² (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 (63878925749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31939462674 + 31939462675.

It is an arithmetic number, because the mean of its divisors is an integer number (31939462675).

Almost surely, 2^63878925349 is an apocalyptic number.

It is an amenable number.

63878925349 is a deficient number, since it is larger than the sum of its proper divisors (1).

63878925349 is an equidigital number, since it uses as much as digits as its factorization.

63878925349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 64.

The spelling of 63878925349 in words is "sixty-three billion, eight hundred seventy-eight million, nine hundred twenty-five thousand, three hundred forty-nine".