65172431663 has 4 divisors (see below), whose sum is σ = 65536523640. Its totient is φ = 64808339688.

The previous prime is 65172431629. The next prime is 65172431669. The reversal of 65172431663 is 36613427156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65172431663 - 2²⁰ = 65171383087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65172431669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182045720 + ... + 182046077.

It is an arithmetic number, because the mean of its divisors is an integer number (16384130910).

Almost surely, 2^65172431663 is an apocalyptic number.

65172431663 is a deficient number, since it is larger than the sum of its proper divisors (364091977).

65172431663 is a wasteful number, since it uses less digits than its factorization.

65172431663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364091976.

The product of its digits is 544320, while the sum is 44.

The spelling of 65172431663 in words is "sixty-five billion, one hundred seventy-two million, four hundred thirty-one thousand, six hundred sixty-three".