78825145 has 16 divisors (see below), whose sum is σ = 108275328. Its totient is φ = 53965440.

The previous prime is 78825137. The next prime is 78825191. The reversal of 78825145 is 54152887.

It is not a de Polignac number, because 78825145 - 2³ = 78825137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78825098 and 78825107.

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, 26997 + ... + 29773.

It is an arithmetic number, because the mean of its divisors is an integer number (6767208).

Almost surely, 2^78825145 is an apocalyptic number.

It is an amenable number.

78825145 is a deficient number, since it is larger than the sum of its proper divisors (29450183).

78825145 is a wasteful number, since it uses less digits than its factorization.

78825145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600.

The product of its digits is 89600, while the sum is 40.

The square root of 78825145 is about 8878.3526061990. The cubic root of 78825145 is about 428.7672371642.

The spelling of 78825145 in words is "seventy-eight million, eight hundred twenty-five thousand, one hundred forty-five".