81176903450 has 12 divisors (see below), whose sum is σ = 150989040510. Its totient is φ = 32470761360.

The previous prime is 81176903413. The next prime is 81176903453. The reversal of 81176903450 is 5430967118.

It can be written as a sum of positive squares in 3 ways, for example, as 45037752841 + 36139150609 = 212221^2 + 190103^2 .

It is not an unprimeable number, because it can be changed into a prime (81176903453) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 811768985 + ... + 811769084.

Almost surely, 2^81176903450 is an apocalyptic number.

81176903450 is a deficient number, since it is larger than the sum of its proper divisors (69812137060).

81176903450 is a wasteful number, since it uses less digits than its factorization.

81176903450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623538081 (or 1623538076 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 81176903450 in words is "eighty-one billion, one hundred seventy-six million, nine hundred three thousand, four hundred fifty".