78845711 has 16 divisors (see below), whose sum is σ = 95932224. Its totient is φ = 63258624.

The previous prime is 78845671. The next prime is 78845729. The reversal of 78845711 is 11754887.

It is a cyclic number.

It is not a de Polignac number, because 78845711 - 2¹⁴ = 78829327 is a prime.

It is a super-2 number, since 2×78845711² = 12433292286191042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78845111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21251 + ... + 24683.

It is an arithmetic number, because the mean of its divisors is an integer number (5995764).

Almost surely, 2^78845711 is an apocalyptic number.

78845711 is a deficient number, since it is larger than the sum of its proper divisors (17086513).

78845711 is a wasteful number, since it uses less digits than its factorization.

78845711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650.

The product of its digits is 62720, while the sum is 41.

The square root of 78845711 is about 8879.5107410262. The cubic root of 78845711 is about 428.8045233213.

The spelling of 78845711 in words is "seventy-eight million, eight hundred forty-five thousand, seven hundred eleven".