65172431669 has 2 divisors, whose sum is σ = 65172431670. Its totient is φ = 65172431668.

The previous prime is 65172431629. The next prime is 65172431689. The reversal of 65172431669 is 96613427156.

65172431669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44663327569 + 20509104100 = 211337^2 + 143210^2 .

It is a cyclic number.

It is not a de Polignac number, because 65172431669 - 2⁸ = 65172431413 is a prime.

It is a super-2 number, since 2×65172431669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65172431629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586215834 + 32586215835.

It is an arithmetic number, because the mean of its divisors is an integer number (32586215835).

Almost surely, 2^65172431669 is an apocalyptic number.

It is an amenable number.

65172431669 is a deficient number, since it is larger than the sum of its proper divisors (1).

65172431669 is an equidigital number, since it uses as much as digits as its factorization.

65172431669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The spelling of 65172431669 in words is "sixty-five billion, one hundred seventy-two million, four hundred thirty-one thousand, six hundred sixty-nine".