81450145114 has 16 divisors (see below), whose sum is σ = 131635201320. Its totient is φ = 37574691840.

The previous prime is 81450145109. The next prime is 81450145201. The reversal of 81450145114 is 41154105418.

It can be written as a sum of positive squares in 4 ways, for example, as 22101876889 + 59348268225 = 148667^2 + 243615^2 .

It is a super-2 number, since 2×81450145114² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81450145114.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680367 + ... + 791074.

Almost surely, 2^81450145114 is an apocalyptic number.

81450145114 is a deficient number, since it is larger than the sum of its proper divisors (50185056206).

81450145114 is a wasteful number, since it uses less digits than its factorization.

81450145114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473585.

The product of its (nonzero) digits is 12800, while the sum is 34.

The spelling of 81450145114 in words is "eighty-one billion, four hundred fifty million, one hundred forty-five thousand, one hundred fourteen".