78364855 has 16 divisors (see below), whose sum is σ = 95423328. Its totient is φ = 61776000.

The previous prime is 78364829. The next prime is 78364859. The reversal of 78364855 is 55846387.

It is not a de Polignac number, because 78364855 - 2¹¹ = 78362807 is a prime.

It is a super-2 number, since 2×78364855² = 12282100998342050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78364859) 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, 118225 + ... + 118885.

It is an arithmetic number, because the mean of its divisors is an integer number (5963958).

Almost surely, 2^78364855 is an apocalyptic number.

78364855 is a deficient number, since it is larger than the sum of its proper divisors (17058473).

78364855 is a wasteful number, since it uses less digits than its factorization.

78364855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978.

The product of its digits is 806400, while the sum is 46.

The square root of 78364855 is about 8852.3926144292. The cubic root of 78364855 is about 427.9310290789.

The spelling of 78364855 in words is "seventy-eight million, three hundred sixty-four thousand, eight hundred fifty-five".