78547090920 has 32 divisors (see below), whose sum is σ = 235641273120. Its totient is φ = 20945890880.

The previous prime is 78547090901. The next prime is 78547090939. The reversal of 78547090920 is 2909074587.

It is an interprime number because it is at equal distance from previous prime (78547090901) and next prime (78547090939).

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 7 ways as a sum of consecutive naturals, for example, 327279426 + ... + 327279665.

It is an arithmetic number, because the mean of its divisors is an integer number (7363789785).

Almost surely, 2^78547090920 is an apocalyptic number.

It is an amenable number.

78547090920 is an abundant number, since it is smaller than the sum of its proper divisors (157094182200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78547090920 is a wasteful number, since it uses less digits than its factorization.

78547090920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654559105 (or 654559101 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 78547090920 in words is "seventy-eight billion, five hundred forty-seven million, ninety thousand, nine hundred twenty".