65172143623 has 2 divisors, whose sum is σ = 65172143624. Its totient is φ = 65172143622.

The previous prime is 65172143579. The next prime is 65172143683. The reversal of 65172143623 is 32634127156.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65172143623 is a prime.

It is a super-2 number, since 2×65172143623² (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 (65172143683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586071811 + 32586071812.

It is an arithmetic number, because the mean of its divisors is an integer number (32586071812).

Almost surely, 2^65172143623 is an apocalyptic number.

65172143623 is a deficient number, since it is larger than the sum of its proper divisors (1).

65172143623 is an equidigital number, since it uses as much as digits as its factorization.

65172143623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The spelling of 65172143623 in words is "sixty-five billion, one hundred seventy-two million, one hundred forty-three thousand, six hundred twenty-three".