81248608698 has 16 divisors (see below), whose sum is σ = 168100570080. Its totient is φ = 26148977456.

The previous prime is 81248608687. The next prime is 81248608733. The reversal of 81248608698 is 89680684218.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233472840 + ... + 233473187.

It is an arithmetic number, because the mean of its divisors is an integer number (10506285630).

Almost surely, 2^81248608698 is an apocalyptic number.

81248608698 is an abundant number, since it is smaller than the sum of its proper divisors (86851961382).

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

81248608698 is a wasteful number, since it uses less digits than its factorization.

81248608698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466946061.

The product of its (nonzero) digits is 10616832, while the sum is 60.

The spelling of 81248608698 in words is "eighty-one billion, two hundred forty-eight million, six hundred eight thousand, six hundred ninety-eight".