81409002746 has 8 divisors (see below), whose sum is σ = 124953353184. Its totient is φ = 39757885020.

The previous prime is 81409002721. The next prime is 81409002751. The reversal of 81409002746 is 64720090418.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473308070 + ... + 473308241.

It is an arithmetic number, because the mean of its divisors is an integer number (15619169148).

Almost surely, 2^81409002746 is an apocalyptic number.

81409002746 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

81409002746 is a deficient number, since it is larger than the sum of its proper divisors (43544350438).

81409002746 is a wasteful number, since it uses less digits than its factorization.

81409002746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946616356.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 81409002746 in words is "eighty-one billion, four hundred nine million, two thousand, seven hundred forty-six".