81608298326 has 8 divisors (see below), whose sum is σ = 122417361264. Its totient is φ = 40802511240.

The previous prime is 81608298313. The next prime is 81608298361. The reversal of 81608298326 is 62389280618.

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

It is a congruent number.

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, 755705 + ... + 856916.

It is an arithmetic number, because the mean of its divisors is an integer number (15302170158).

Almost surely, 2^81608298326 is an apocalyptic number.

81608298326 is a deficient number, since it is larger than the sum of its proper divisors (40809062938).

81608298326 is a wasteful number, since it uses less digits than its factorization.

81608298326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637926.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 81608298326 in words is "eighty-one billion, six hundred eight million, two hundred ninety-eight thousand, three hundred twenty-six".