78878625312775 has 24 divisors (see below), whose sum is σ = 98262079511904. Its totient is φ = 62811304857600.

The previous prime is 78878625312743. The next prime is 78878625312793. The reversal of 78878625312775 is 57721352687887.

It is not a de Polignac number, because 78878625312775 - 2⁵ = 78878625312743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3072955 + ... + 12930595.

It is an arithmetic number, because the mean of its divisors is an integer number (4094253312996).

Almost surely, 2^{78878625312775} is an apocalyptic number.

78878625312775 is a deficient number, since it is larger than the sum of its proper divisors (19383454199129).

78878625312775 is a wasteful number, since it uses less digits than its factorization.

78878625312775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9859131 (or 9859126 counting only the distinct ones).

The product of its digits is 2212761600, while the sum is 76.

The spelling of 78878625312775 in words is "seventy-eight trillion, eight hundred seventy-eight billion, six hundred twenty-five million, three hundred twelve thousand, seven hundred seventy-five".