81672132327 has 8 divisors (see below), whose sum is σ = 108897507840. Its totient is φ = 54447422520.

The previous prime is 81672132293. The next prime is 81672132341. The reversal of 81672132327 is 72323127618.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81672132327 - 2²⁶ = 81605023463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81672130327) 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 in 7 ways as a sum of consecutive naturals, for example, 339924 + ... + 528102.

It is an arithmetic number, because the mean of its divisors is an integer number (13612188480).

Almost surely, 2^81672132327 is an apocalyptic number.

81672132327 is a deficient number, since it is larger than the sum of its proper divisors (27225375513).

81672132327 is a wasteful number, since it uses less digits than its factorization.

81672132327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332853.

The product of its digits is 169344, while the sum is 42.

The spelling of 81672132327 in words is "eighty-one billion, six hundred seventy-two million, one hundred thirty-two thousand, three hundred twenty-seven".