634872661051073 has 2 divisors, whose sum is σ = 634872661051074. Its totient is φ = 634872661051072.

The previous prime is 634872661051043. The next prime is 634872661051127. The reversal of 634872661051073 is 370150166278436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534076121147569 + 100796539903504 = 23110087^2 + 10039748^2 .

It is a cyclic number.

It is not a de Polignac number, because 634872661051073 - 2¹⁸ = 634872660788929 is a prime.

It is a super-2 number, since 2×634872661051073² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634872661051043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317436330525536 + 317436330525537.

It is an arithmetic number, because the mean of its divisors is an integer number (317436330525537).

Almost surely, 2^{634872661051073} is an apocalyptic number.

It is an amenable number.

634872661051073 is a deficient number, since it is larger than the sum of its proper divisors (1).

634872661051073 is an equidigital number, since it uses as much as digits as its factorization.

634872661051073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 634872661051073 in words is "six hundred thirty-four trillion, eight hundred seventy-two billion, six hundred sixty-one million, fifty-one thousand, seventy-three".