81298470678 has 64 divisors (see below), whose sum is σ = 165255830208. Its totient is φ = 26660874240.

The previous prime is 81298470647. The next prime is 81298470769. The reversal of 81298470678 is 87607489218.

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 31 ways as a sum of consecutive naturals, for example, 79625808 + ... + 79626828.

It is an arithmetic number, because the mean of its divisors is an integer number (2582122347).

Almost surely, 2^81298470678 is an apocalyptic number.

81298470678 is an abundant number, since it is smaller than the sum of its proper divisors (83957359530).

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

81298470678 is a wasteful number, since it uses less digits than its factorization.

81298470678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937.

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 81298470678 in words is "eighty-one billion, two hundred ninety-eight million, four hundred seventy thousand, six hundred seventy-eight".