80979921288 has 64 divisors (see below), whose sum is σ = 257079120000. Its totient is φ = 23137119936.

The previous prime is 80979921287. The next prime is 80979921293. The reversal of 80979921288 is 88212997908.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (80979921287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26777563 + ... + 26780586.

It is an arithmetic number, because the mean of its divisors is an integer number (4016861250).

Almost surely, 2^80979921288 is an apocalyptic number.

It is an amenable number.

80979921288 is an abundant number, since it is smaller than the sum of its proper divisors (176099198712).

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

80979921288 is a wasteful number, since it uses less digits than its factorization.

80979921288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53558171 (or 53558161 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The spelling of 80979921288 in words is "eighty billion, nine hundred seventy-nine million, nine hundred twenty-one thousand, two hundred eighty-eight".