63421478137 has 2 divisors, whose sum is σ = 63421478138. Its totient is φ = 63421478136.

The previous prime is 63421478093. The next prime is 63421478177. The reversal of 63421478137 is 73187412436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37771533801 + 25649944336 = 194349^2 + 160156^2 .

It is a cyclic number.

It is not a de Polignac number, because 63421478137 - 2¹¹ = 63421476089 is a prime.

It is not a weakly prime, because it can be changed into another prime (63421478177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31710739068 + 31710739069.

It is an arithmetic number, because the mean of its divisors is an integer number (31710739069).

Almost surely, 2^63421478137 is an apocalyptic number.

It is an amenable number.

63421478137 is a deficient number, since it is larger than the sum of its proper divisors (1).

63421478137 is an equidigital number, since it uses as much as digits as its factorization.

63421478137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The spelling of 63421478137 in words is "sixty-three billion, four hundred twenty-one million, four hundred seventy-eight thousand, one hundred thirty-seven".