81744296654 has 8 divisors (see below), whose sum is σ = 122916241920. Its totient is φ = 40772216016.

The previous prime is 81744296639. The next prime is 81744296671. The reversal of 81744296654 is 45669244718.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81744296654.

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 3 ways as a sum of consecutive naturals, for example, 49965134 + ... + 49966769.

It is an arithmetic number, because the mean of its divisors is an integer number (15364530240).

Almost surely, 2^81744296654 is an apocalyptic number.

81744296654 is a deficient number, since it is larger than the sum of its proper divisors (41171945266).

81744296654 is a wasteful number, since it uses less digits than its factorization.

81744296654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99932314.

The product of its digits is 11612160, while the sum is 56.

The spelling of 81744296654 in words is "eighty-one billion, seven hundred forty-four million, two hundred ninety-six thousand, six hundred fifty-four".