81298470708 has 144 divisors (see below), whose sum is σ = 255537085440. Its totient is φ = 21220227072.

The previous prime is 81298470647. The next prime is 81298470769. The reversal of 81298470708 is 80707489218.

It is a happy number.

81298470708 is a `hidden beast` number, since 8 + 12 + 98 + 470 + 70 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (81298470647) and next prime (81298470769).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189853 + ... + 445691.

Almost surely, 2^81298470708 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 81298470708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127768542720).

81298470708 is an abundant number, since it is smaller than the sum of its proper divisors (174238614732).

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

81298470708 is a wasteful number, since it uses less digits than its factorization.

81298470708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255966 (or 255961 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 81298470708 in words is "eighty-one billion, two hundred ninety-eight million, four hundred seventy thousand, seven hundred eight".