81358798234 has 8 divisors (see below), whose sum is σ = 139472225568. Its totient is φ = 34868056380.

The previous prime is 81358798231. The next prime is 81358798259. The reversal of 81358798234 is 43289785318.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (81358798231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2905671352 + ... + 2905671379.

It is an arithmetic number, because the mean of its divisors is an integer number (17434028196).

Almost surely, 2^81358798234 is an apocalyptic number.

81358798234 is a deficient number, since it is larger than the sum of its proper divisors (58113427334).

81358798234 is a wasteful number, since it uses less digits than its factorization.

81358798234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5811342740.

The product of its digits is 11612160, while the sum is 58.

The spelling of 81358798234 in words is "eighty-one billion, three hundred fifty-eight million, seven hundred ninety-eight thousand, two hundred thirty-four".