78043525 has 18 divisors (see below), whose sum is σ = 112575570. Its totient is φ = 53514720.

The previous prime is 78043519. The next prime is 78043571. The reversal of 78043525 is 52534087.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3969 + 78039556 = 63^2 + 8834^2 .

It is not a de Polignac number, because 78043525 - 2¹⁹ = 77519237 is a prime.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 30630 + ... + 33079.

Almost surely, 2^78043525 is an apocalyptic number.

It is an amenable number.

78043525 is a deficient number, since it is larger than the sum of its proper divisors (34532045).

78043525 is a wasteful number, since it uses less digits than its factorization.

78043525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63733 (or 63721 counting only the distinct ones).

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

The square root of 78043525 is about 8834.2246405669. The cubic root of 78043525 is about 427.3453266694.

The spelling of 78043525 in words is "seventy-eight million, forty-three thousand, five hundred twenty-five".