81487718162 has 16 divisors (see below), whose sum is σ = 129443069952. Its totient is φ = 38340820800.

The previous prime is 81487718131. The next prime is 81487718183. The reversal of 81487718162 is 26181778418.

It is a super-2 number, since 2×81487718162² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 13787 + ... + 403937.

It is an arithmetic number, because the mean of its divisors is an integer number (8090191872).

Almost surely, 2^81487718162 is an apocalyptic number.

81487718162 is a deficient number, since it is larger than the sum of its proper divisors (47955351790).

81487718162 is a wasteful number, since it uses less digits than its factorization.

81487718162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396313.

The product of its digits is 1204224, while the sum is 53.

The spelling of 81487718162 in words is "eighty-one billion, four hundred eighty-seven million, seven hundred eighteen thousand, one hundred sixty-two".