65172431629 has 2 divisors, whose sum is σ = 65172431630. Its totient is φ = 65172431628.

The previous prime is 65172431617. The next prime is 65172431669. The reversal of 65172431629 is 92613427156.

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., 59425275529 + 5747156100 = 243773^2 + 75810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65172431629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65172431669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586215814 + 32586215815.

It is an arithmetic number, because the mean of its divisors is an integer number (32586215815).

Almost surely, 2^65172431629 is an apocalyptic number.

It is an amenable number.

65172431629 is a deficient number, since it is larger than the sum of its proper divisors (1).

65172431629 is an equidigital number, since it uses as much as digits as its factorization.

65172431629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The spelling of 65172431629 in words is "sixty-five billion, one hundred seventy-two million, four hundred thirty-one thousand, six hundred twenty-nine".