78465324408825 has 24 divisors (see below), whose sum is σ = 130676265835488. Its totient is φ = 41542711895680.

The previous prime is 78465324408817. The next prime is 78465324408827. The reversal of 78465324408825 is 52880442356487.

It is a happy number.

It is not a de Polignac number, because 78465324408825 - 2³ = 78465324408817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78465324408827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3818253687 + ... + 3818274236.

It is an arithmetic number, because the mean of its divisors is an integer number (5444844409812).

Almost surely, 2^{78465324408825} is an apocalyptic number.

78465324408825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78465324408825 is a deficient number, since it is larger than the sum of its proper divisors (52210941426663).

78465324408825 is a wasteful number, since it uses less digits than its factorization.

78465324408825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636528073 (or 7636528068 counting only the distinct ones).

The product of its (nonzero) digits is 412876800, while the sum is 66.

The spelling of 78465324408825 in words is "seventy-eight trillion, four hundred sixty-five billion, three hundred twenty-four million, four hundred eight thousand, eight hundred twenty-five".