81071102610 has 80 divisors (see below), whose sum is σ = 218200891392. Its totient is φ = 21598164000.

The previous prime is 81071102599. The next prime is 81071102701. The reversal of 81071102610 is 1620117018.

It is a super-2 number, since 2×81071102610² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 803695 + ... + 898925.

Almost surely, 2^81071102610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81071102610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109100445696).

81071102610 is an abundant number, since it is smaller than the sum of its proper divisors (137129788782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81071102610 is a wasteful number, since it uses less digits than its factorization.

81071102610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96301 (or 96292 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

Adding to 81071102610 its reverse (1620117018), we get a palindrome (82691219628).

The spelling of 81071102610 in words is "eighty-one billion, seventy-one million, one hundred two thousand, six hundred ten".