81098124696 has 160 divisors (see below), whose sum is σ = 233551179840. Its totient is φ = 26272553472.

The previous prime is 81098124689. The next prime is 81098124703. The reversal of 81098124696 is 69642189018.

81098124696 is a `hidden beast` number, since 81 + 0 + 98 + 12 + 469 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (81098124689) and next prime (81098124703).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34116660 + ... + 34119036.

It is an arithmetic number, because the mean of its divisors is an integer number (1459694874).

Almost surely, 2^81098124696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81098124696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116775589920).

81098124696 is an abundant number, since it is smaller than the sum of its proper divisors (152453055144).

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

81098124696 is a wasteful number, since it uses less digits than its factorization.

81098124696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 81098124696 in words is "eighty-one billion, ninety-eight million, one hundred twenty-four thousand, six hundred ninety-six".