81459830450 has 24 divisors (see below), whose sum is σ = 151613623488. Its totient is φ = 32562784080.

The previous prime is 81459830437. The next prime is 81459830467. The reversal of 81459830450 is 5403895418.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81459830395 and 81459830404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 450782 + ... + 605081.

It is an arithmetic number, because the mean of its divisors is an integer number (6317234312).

Almost surely, 2^81459830450 is an apocalyptic number.

81459830450 is a deficient number, since it is larger than the sum of its proper divisors (70153793038).

81459830450 is a wasteful number, since it uses less digits than its factorization.

81459830450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057418 (or 1057413 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 81459830450 in words is "eighty-one billion, four hundred fifty-nine million, eight hundred thirty thousand, four hundred fifty".