80378513121 has 24 divisors (see below), whose sum is σ = 115739326560. Its totient is φ = 49584757824.

The previous prime is 80378513113. The next prime is 80378513147. The reversal of 80378513121 is 12131587308.

It is not a de Polignac number, because 80378513121 - 2³ = 80378513113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80378513121.

It is not an unprimeable number, because it can be changed into a prime (80378513101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 816436 + ... + 909573.

It is an arithmetic number, because the mean of its divisors is an integer number (4822471940).

Almost surely, 2^80378513121 is an apocalyptic number.

It is an amenable number.

80378513121 is a deficient number, since it is larger than the sum of its proper divisors (35360813439).

80378513121 is a wasteful number, since it uses less digits than its factorization.

80378513121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726093 (or 1726074 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 80378513121 in words is "eighty billion, three hundred seventy-eight million, five hundred thirteen thousand, one hundred twenty-one".