81303379807 has 16 divisors (see below), whose sum is σ = 92384813920. Its totient is φ = 70930339200.

The previous prime is 81303379771. The next prime is 81303379841. The reversal of 81303379807 is 70897330318.

It is a cyclic number.

It is not a de Polignac number, because 81303379807 - 2⁷ = 81303379679 is a prime.

It is a super-2 number, since 2×81303379807² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81303379877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286944 + ... + 494917.

It is an arithmetic number, because the mean of its divisors is an integer number (5774050870).

Almost surely, 2^81303379807 is an apocalyptic number.

81303379807 is a deficient number, since it is larger than the sum of its proper divisors (11081434113).

81303379807 is a wasteful number, since it uses less digits than its factorization.

81303379807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782314.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 81303379807 in words is "eighty-one billion, three hundred three million, three hundred seventy-nine thousand, eight hundred seven".