81424182155 has 16 divisors (see below), whose sum is σ = 98640612864. Its totient is φ = 64518511200.

The previous prime is 81424182131. The next prime is 81424182197. The reversal of 81424182155 is 55128142418.

It is not a de Polignac number, because 81424182155 - 2¹⁰ = 81424181131 is a prime.

It is a super-2 number, since 2×81424182155² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3815144 + ... + 3836426.

It is an arithmetic number, because the mean of its divisors is an integer number (6165038304).

Almost surely, 2^81424182155 is an apocalyptic number.

81424182155 is a deficient number, since it is larger than the sum of its proper divisors (17216430709).

81424182155 is a wasteful number, since it uses less digits than its factorization.

81424182155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28546.

The product of its digits is 102400, while the sum is 41.

The spelling of 81424182155 in words is "eighty-one billion, four hundred twenty-four million, one hundred eighty-two thousand, one hundred fifty-five".