81298470676 has 24 divisors (see below), whose sum is σ = 143339888160. Its totient is φ = 40344397152.

The previous prime is 81298470647. The next prime is 81298470769. The reversal of 81298470676 is 67607489218.

It is a self number, because there is not a number n which added to its sum of digits gives 81298470676.

It is a congruent 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, 1943655 + ... + 1985041.

It is an arithmetic number, because the mean of its divisors is an integer number (5972495340).

Almost surely, 2^81298470676 is an apocalyptic number.

It is an amenable number.

81298470676 is a deficient number, since it is larger than the sum of its proper divisors (62041417484).

81298470676 is a wasteful number, since it uses less digits than its factorization.

81298470676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45063 (or 45061 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 81298470676 in words is "eighty-one billion, two hundred ninety-eight million, four hundred seventy thousand, six hundred seventy-six".