78504624452825 has 6 divisors (see below), whose sum is σ = 97345734321534. Its totient is φ = 62803699562240.

The previous prime is 78504624452789. The next prime is 78504624452827. The reversal of 78504624452825 is 52825442640587.

It can be written as a sum of positive squares in 3 ways, for example, as 6114408489289 + 72390215963536 = 2472733^2 + 8508244^2 .

It is not a de Polignac number, because 78504624452825 - 2²² = 78504620258521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78504624452827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570092489032 + ... + 1570092489081.

It is an arithmetic number, because the mean of its divisors is an integer number (16224289053589).

Almost surely, 2^{78504624452825} is an apocalyptic number.

It is an amenable number.

78504624452825 is a deficient number, since it is larger than the sum of its proper divisors (18841109868709).

78504624452825 is a wasteful number, since it uses less digits than its factorization.

78504624452825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140184978123 (or 3140184978118 counting only the distinct ones).

The product of its (nonzero) digits is 172032000, while the sum is 62.

The spelling of 78504624452825 in words is "seventy-eight trillion, five hundred four billion, six hundred twenty-four million, four hundred fifty-two thousand, eight hundred twenty-five".