81298470679 has 8 divisors (see below), whose sum is σ = 82726225920. Its totient is φ = 79872376056.

The previous prime is 81298470647. The next prime is 81298470769. The reversal of 81298470679 is 97607489218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81298470679 - 2⁵ = 81298470647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81298471679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316177 + ... + 512410.

It is an arithmetic number, because the mean of its divisors is an integer number (10340778240).

Almost surely, 2^81298470679 is an apocalyptic number.

81298470679 is a deficient number, since it is larger than the sum of its proper divisors (1427755241).

81298470679 is a wasteful number, since it uses less digits than its factorization.

81298470679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830309.

The product of its (nonzero) digits is 12192768, while the sum is 61.

The spelling of 81298470679 in words is "eighty-one billion, two hundred ninety-eight million, four hundred seventy thousand, six hundred seventy-nine".