78512055 has 16 divisors (see below), whose sum is σ = 125730144. Its totient is φ = 41836160.

The previous prime is 78512033. The next prime is 78512081. The reversal of 78512055 is 55021587.

It is a happy number.

It is not a de Polignac number, because 78512055 - 2⁶ = 78511991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28645 + ... + 31265.

It is an arithmetic number, because the mean of its divisors is an integer number (7858134).

Almost surely, 2^78512055 is an apocalyptic number.

78512055 is a deficient number, since it is larger than the sum of its proper divisors (47218089).

78512055 is a wasteful number, since it uses less digits than its factorization.

78512055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 78512055 is about 8860.7028502258. The cubic root of 78512055 is about 428.1988023798.

The spelling of 78512055 in words is "seventy-eight million, five hundred twelve thousand, fifty-five".