63375433081 has 2 divisors, whose sum is σ = 63375433082. Its totient is φ = 63375433080.

The previous prime is 63375433057. The next prime is 63375433207. The reversal of 63375433081 is 18033457336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40729697856 + 22645735225 = 201816^2 + 150485^2 .

It is a cyclic number.

It is not a de Polignac number, because 63375433081 - 2⁹ = 63375432569 is a prime.

It is a super-2 number, since 2×63375433081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63375436081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31687716540 + 31687716541.

It is an arithmetic number, because the mean of its divisors is an integer number (31687716541).

Almost surely, 2^63375433081 is an apocalyptic number.

It is an amenable number.

63375433081 is a deficient number, since it is larger than the sum of its proper divisors (1).

63375433081 is an equidigital number, since it uses as much as digits as its factorization.

63375433081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 63375433081 in words is "sixty-three billion, three hundred seventy-five million, four hundred thirty-three thousand, eighty-one".