81821182627 has 8 divisors (see below), whose sum is σ = 87413048000. Its totient is φ = 76357866024.

The previous prime is 81821182621. The next prime is 81821182657. The reversal of 81821182627 is 72628112818.

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

It is a cyclic number.

It is not a de Polignac number, because 81821182627 - 2²⁷ = 81686964899 is a prime.

It is a super-2 number, since 2×81821182627² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81821182621) 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, 32135877 + ... + 32138422.

It is an arithmetic number, because the mean of its divisors is an integer number (10926631000).

Almost surely, 2^81821182627 is an apocalyptic number.

81821182627 is a deficient number, since it is larger than the sum of its proper divisors (5591865373).

81821182627 is a wasteful number, since it uses less digits than its factorization.

81821182627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64274385.

The product of its digits is 172032, while the sum is 46.

The spelling of 81821182627 in words is "eighty-one billion, eight hundred twenty-one million, one hundred eighty-two thousand, six hundred twenty-seven".