78025543 has 4 divisors (see below), whose sum is σ = 80542528. Its totient is φ = 75508560.

The previous prime is 78025537. The next prime is 78025559. The reversal of 78025543 is 34552087.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78025543 - 2²⁵ = 44471111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78025499 and 78025508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78025513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258446 + ... + 1258507.

It is an arithmetic number, because the mean of its divisors is an integer number (20135632).

Almost surely, 2^78025543 is an apocalyptic number.

78025543 is a deficient number, since it is larger than the sum of its proper divisors (2516985).

78025543 is a wasteful number, since it uses less digits than its factorization.

78025543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516984.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 78025543 is about 8833.2068355722. The cubic root of 78025543 is about 427.3125026184.

The spelling of 78025543 in words is "seventy-eight million, twenty-five thousand, five hundred forty-three".