78858963945 has 24 divisors (see below), whose sum is σ = 144729394056. Its totient is φ = 39584107008.

The previous prime is 78858963919. The next prime is 78858963971. The reversal of 78858963945 is 54936985887.

78858963945 is a `hidden beast` number, since 7 + 8 + 8 + 589 + 6 + 39 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (78858963919) and next prime (78858963971).

It can be written as a sum of positive squares in 4 ways, for example, as 30888765504 + 47970198441 = 175752^2 + 219021^2 .

It is not a de Polignac number, because 78858963945 - 2⁷ = 78858963817 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51541042 + ... + 51542571.

It is an arithmetic number, because the mean of its divisors is an integer number (6030391419).

Almost surely, 2^78858963945 is an apocalyptic number.

It is an amenable number.

78858963945 is a deficient number, since it is larger than the sum of its proper divisors (65870430111).

78858963945 is a wasteful number, since it uses less digits than its factorization.

78858963945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103083641 (or 103083638 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 72.

The spelling of 78858963945 in words is "seventy-eight billion, eight hundred fifty-eight million, nine hundred sixty-three thousand, nine hundred forty-five".