81106617596 has 12 divisors (see below), whose sum is σ = 141988382760. Its totient is φ = 40538508240.

The previous prime is 81106617539. The next prime is 81106617601. The reversal of 81106617596 is 69571660118.

It is a congruent number.

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, 3687806 + ... + 3709733.

It is an arithmetic number, because the mean of its divisors is an integer number (11832365230).

Almost surely, 2^81106617596 is an apocalyptic number.

It is an amenable number.

81106617596 is a deficient number, since it is larger than the sum of its proper divisors (60881765164).

81106617596 is a wasteful number, since it uses less digits than its factorization.

81106617596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400284 (or 7400282 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 81106617596 in words is "eighty-one billion, one hundred six million, six hundred seventeen thousand, five hundred ninety-six".