78451120578 has 32 divisors (see below), whose sum is σ = 163851465600. Its totient is φ = 24993938816.

The previous prime is 78451120571. The next prime is 78451120591. The reversal of 78451120578 is 87502115487.

It is not an unprimeable number, because it can be changed into a prime (78451120571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42633 + ... + 398396.

It is an arithmetic number, because the mean of its divisors is an integer number (5120358300).

Almost surely, 2^78451120578 is an apocalyptic number.

78451120578 is an abundant number, since it is smaller than the sum of its proper divisors (85400345022).

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

78451120578 is a wasteful number, since it uses less digits than its factorization.

78451120578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442346.

The product of its (nonzero) digits is 627200, while the sum is 48.

The spelling of 78451120578 in words is "seventy-eight billion, four hundred fifty-one million, one hundred twenty thousand, five hundred seventy-eight".