78758520212 has 12 divisors (see below), whose sum is σ = 140759908800. Its totient is φ = 38541403416.

The previous prime is 78758520173. The next prime is 78758520223. The reversal of 78758520212 is 21202585787.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 209463962 + ... + 209464337.

It is an arithmetic number, because the mean of its divisors is an integer number (11729992400).

Almost surely, 2^78758520212 is an apocalyptic number.

It is an amenable number.

78758520212 is a deficient number, since it is larger than the sum of its proper divisors (62001388588).

78758520212 is a wasteful number, since it uses less digits than its factorization.

78758520212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418928350 (or 418928348 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 78758520212 in words is "seventy-eight billion, seven hundred fifty-eight million, five hundred twenty thousand, two hundred twelve".