81370471004 has 12 divisors (see below), whose sum is σ = 142436032200. Its totient is φ = 40674461808.

The previous prime is 81370470997. The next prime is 81370471027. The reversal of 81370471004 is 40017407318.

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 3 ways as a sum of consecutive naturals, for example, 2676419 + ... + 2706650.

It is an arithmetic number, because the mean of its divisors is an integer number (11869669350).

Almost surely, 2^81370471004 is an apocalyptic number.

It is an amenable number.

81370471004 is a deficient number, since it is larger than the sum of its proper divisors (61065561196).

81370471004 is a wasteful number, since it uses less digits than its factorization.

81370471004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386852 (or 5386850 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 81370471004 in words is "eighty-one billion, three hundred seventy million, four hundred seventy-one thousand, four".