63878355137 has 2 divisors, whose sum is σ = 63878355138. Its totient is φ = 63878355136.

The previous prime is 63878355119. The next prime is 63878355143. The reversal of 63878355137 is 73155387836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46029127936 + 17849227201 = 214544^2 + 133601^2 .

It is a cyclic number.

It is not a de Polignac number, because 63878355137 - 2¹⁴ = 63878338753 is a prime.

It is not a weakly prime, because it can be changed into another prime (63878345137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31939177568 + 31939177569.

It is an arithmetic number, because the mean of its divisors is an integer number (31939177569).

Almost surely, 2^63878355137 is an apocalyptic number.

It is an amenable number.

63878355137 is a deficient number, since it is larger than the sum of its proper divisors (1).

63878355137 is an equidigital number, since it uses as much as digits as its factorization.

63878355137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12700800, while the sum is 56.

The spelling of 63878355137 in words is "sixty-three billion, eight hundred seventy-eight million, three hundred fifty-five thousand, one hundred thirty-seven".