81017830810 has 32 divisors (see below), whose sum is σ = 166750958592. Its totient is φ = 27763257600.

The previous prime is 81017830771. The next prime is 81017830867. The reversal of 81017830810 is 1803871018.

It is a super-2 number, since 2×81017830810² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81017830810.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160047 + ... + 433186.

It is an arithmetic number, because the mean of its divisors is an integer number (5210967456).

Almost surely, 2^81017830810 is an apocalyptic number.

81017830810 is an abundant number, since it is smaller than the sum of its proper divisors (85733127782).

81017830810 is a wasteful number, since it uses less digits than its factorization.

81017830810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595198.

The product of its (nonzero) digits is 10752, while the sum is 37.

The spelling of 81017830810 in words is "eighty-one billion, seventeen million, eight hundred thirty thousand, eight hundred ten".