80998701878 has 8 divisors (see below), whose sum is σ = 121506511872. Its totient is φ = 40496531256.

The previous prime is 80998701841. The next prime is 80998701899. The reversal of 80998701878 is 87810789908.

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

It is a super-2 number, since 2×80998701878² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1373750 + ... + 1431497.

It is an arithmetic number, because the mean of its divisors is an integer number (15188313984).

Almost surely, 2^80998701878 is an apocalyptic number.

80998701878 is a deficient number, since it is larger than the sum of its proper divisors (40507809994).

80998701878 is a wasteful number, since it uses less digits than its factorization.

80998701878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819686.

The product of its (nonzero) digits is 16257024, while the sum is 65.

The spelling of 80998701878 in words is "eighty billion, nine hundred ninety-eight million, seven hundred one thousand, eight hundred seventy-eight".