81847430670 has 32 divisors (see below), whose sum is σ = 196902679680. Its totient is φ = 21773887520.

The previous prime is 81847430663. The next prime is 81847430719. The reversal of 81847430670 is 7603474818.

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 15 ways as a sum of consecutive naturals, for example, 3243096 + ... + 3268235.

It is an arithmetic number, because the mean of its divisors is an integer number (6153208740).

Almost surely, 2^81847430670 is an apocalyptic number.

81847430670 is an abundant number, since it is smaller than the sum of its proper divisors (115055249010).

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

81847430670 is a wasteful number, since it uses less digits than its factorization.

81847430670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511760.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 81847430670 in words is "eighty-one billion, eight hundred forty-seven million, four hundred thirty thousand, six hundred seventy".