80129819815 has 12 divisors (see below), whose sum is σ = 99585840744. Its totient is φ = 61893374816.

The previous prime is 80129819779. The next prime is 80129819857. The reversal of 80129819815 is 51891892108.

It is a happy number.

It is not a de Polignac number, because 80129819815 - 2¹¹ = 80129817767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9523717 + ... + 9532126.

It is an arithmetic number, because the mean of its divisors is an integer number (8298820062).

Almost surely, 2^80129819815 is an apocalyptic number.

80129819815 is a deficient number, since it is larger than the sum of its proper divisors (19456020929).

80129819815 is a wasteful number, since it uses less digits than its factorization.

80129819815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19055906 (or 19055877 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 52.

The spelling of 80129819815 in words is "eighty billion, one hundred twenty-nine million, eight hundred nineteen thousand, eight hundred fifteen".