78648453 has 12 divisors (see below), whose sum is σ = 122342220. Its totient is φ = 48398976.

The previous prime is 78648439. The next prime is 78648461. The reversal of 78648453 is 35484687.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 58018689 = 4542^2 + 7617^2 .

It is not a de Polignac number, because 78648453 - 2⁶ = 78648389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78648399 and 78648408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78648403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335988 + ... + 336221.

It is an arithmetic number, because the mean of its divisors is an integer number (10195185).

Almost surely, 2^78648453 is an apocalyptic number.

It is an amenable number.

78648453 is a deficient number, since it is larger than the sum of its proper divisors (43693767).

78648453 is a wasteful number, since it uses less digits than its factorization.

78648453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672228 (or 672225 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 78648453 is about 8868.3963037293. The cubic root of 78648453 is about 428.4466270418.

The spelling of 78648453 in words is "seventy-eight million, six hundred forty-eight thousand, four hundred fifty-three".