81231630304858 has 8 divisors (see below), whose sum is σ = 132924485953440. Its totient is φ = 36923468320380.

The previous prime is 81231630304841. The next prime is 81231630304871. The reversal of 81231630304858 is 85840303613218.

It is a happy number.

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

It is a super-2 number, since 2×81231630304858² (a number of 29 digits) contains 22 as substring.

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, 1846173415998 + ... + 1846173416041.

It is an arithmetic number, because the mean of its divisors is an integer number (16615560744180).

Almost surely, 2^{81231630304858} is an apocalyptic number.

81231630304858 is a deficient number, since it is larger than the sum of its proper divisors (51692855648582).

81231630304858 is a wasteful number, since it uses less digits than its factorization.

81231630304858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692346832052.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 81231630304858 in words is "eighty-one trillion, two hundred thirty-one billion, six hundred thirty million, three hundred four thousand, eight hundred fifty-eight".