81444103462 has 16 divisors (see below), whose sum is σ = 123406189200. Its totient is φ = 40308906400.

The previous prime is 81444103451. The next prime is 81444103493. The reversal of 81444103462 is 26430144418.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 806589 + ... + 901927.

It is an arithmetic number, because the mean of its divisors is an integer number (7712886825).

Almost surely, 2^81444103462 is an apocalyptic number.

81444103462 is a deficient number, since it is larger than the sum of its proper divisors (41962085738).

81444103462 is a wasteful number, since it uses less digits than its factorization.

81444103462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99671.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 81444103462 in words is "eighty-one billion, four hundred forty-four million, one hundred three thousand, four hundred sixty-two".