81407017100 has 36 divisors (see below), whose sum is σ = 176665776000. Its totient is φ = 32560493760.

The previous prime is 81407017099. The next prime is 81407017129. The reversal of 81407017100 is 171070418.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2406101 + ... + 2439699.

Almost surely, 2^81407017100 is an apocalyptic number.

It is an amenable number.

81407017100 is an abundant number, since it is smaller than the sum of its proper divisors (95258758900).

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

81407017100 is a wasteful number, since it uses less digits than its factorization.

81407017100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57842 (or 57835 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 29.

Adding to 81407017100 its reverse (171070418), we get a palindrome (81578087518).

The spelling of 81407017100 in words is "eighty-one billion, four hundred seven million, seventeen thousand, one hundred".