80105878 has 4 divisors (see below), whose sum is σ = 120158820. Its totient is φ = 40052938.

The previous prime is 80105863. The next prime is 80105899. The reversal of 80105878 is 87850108.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20026468 + ... + 20026471.

It is an arithmetic number, because the mean of its divisors is an integer number (30039705).

Almost surely, 2^80105878 is an apocalyptic number.

80105878 is a deficient number, since it is larger than the sum of its proper divisors (40052942).

80105878 is a wasteful number, since it uses less digits than its factorization.

80105878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40052941.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 80105878 is about 8950.1887130943. The cubic root of 80105878 is about 431.0769435719.

The spelling of 80105878 in words is "eighty million, one hundred five thousand, eight hundred seventy-eight".