63878925749 has 2 divisors, whose sum is σ = 63878925750. Its totient is φ = 63878925748.

The previous prime is 63878925727. The next prime is 63878925793. The reversal of 63878925749 is 94752987836.

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., 51203543524 + 12675382225 = 226282^2 + 112585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63878925749 is a prime.

It is a super-2 number, since 2×63878925749² (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 (63878925349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31939462874 + 31939462875.

It is an arithmetic number, because the mean of its divisors is an integer number (31939462875).

Almost surely, 2^63878925749 is an apocalyptic number.

It is an amenable number.

63878925749 is a deficient number, since it is larger than the sum of its proper divisors (1).

63878925749 is an equidigital number, since it uses as much as digits as its factorization.

63878925749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 182891520, while the sum is 68.

The spelling of 63878925749 in words is "sixty-three billion, eight hundred seventy-eight million, nine hundred twenty-five thousand, seven hundred forty-nine".