80778111 has 8 divisors (see below), whose sum is σ = 107745840. Its totient is φ = 53831232.

The previous prime is 80778107. The next prime is 80778121. The reversal of 80778111 is 11187708.

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

It is not a de Polignac number, because 80778111 - 2² = 80778107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80778121) 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, 11355 + ... + 17043.

It is an arithmetic number, because the mean of its divisors is an integer number (13468230).

Almost surely, 2^80778111 is an apocalyptic number.

80778111 is a deficient number, since it is larger than the sum of its proper divisors (26967729).

80778111 is a wasteful number, since it uses less digits than its factorization.

80778111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10425.

The product of its (nonzero) digits is 3136, while the sum is 33.

The square root of 80778111 is about 8987.6643795816. The cubic root of 80778111 is about 432.2794242063.

The spelling of 80778111 in words is "eighty million, seven hundred seventy-eight thousand, one hundred eleven".