80687999999 has 8 divisors (see below), whose sum is σ = 84286053600. Its totient is φ = 77097436416.

The previous prime is 80687999981. The next prime is 80688000061. The reversal of 80687999999 is 99999978608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80687999999 - 2¹⁶ = 80687934463 is a prime.

It is a Duffinian number.

80687999999 is a modest number, since divided by 999999 gives 80687 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80687992999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1850474 + ... + 1893575.

It is an arithmetic number, because the mean of its divisors is an integer number (10535756700).

Almost surely, 2^80687999999 is an apocalyptic number.

80687999999 is a deficient number, since it is larger than the sum of its proper divisors (3598053601).

80687999999 is a wasteful number, since it uses less digits than its factorization.

80687999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745009.

The product of its (nonzero) digits is 1428513408, while the sum is 83.

The spelling of 80687999999 in words is "eighty billion, six hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-nine".