78578578642953 has 8 divisors (see below), whose sum is σ = 104771617582528. Its totient is φ = 52385629399344.

The previous prime is 78578578642913. The next prime is 78578578643017. The reversal of 78578578642953 is 35924687587587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78578578642953 - 2³³ = 78569988708361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78578578642903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20352526 + ... + 23903607.

It is an arithmetic number, because the mean of its divisors is an integer number (13096452197816).

Almost surely, 2^{78578578642953} is an apocalyptic number.

It is an amenable number.

78578578642953 is a deficient number, since it is larger than the sum of its proper divisors (26193038939575).

78578578642953 is a wasteful number, since it uses less digits than its factorization.

78578578642953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44847983.

The product of its digits is 28449792000, while the sum is 84.

The spelling of 78578578642953 in words is "seventy-eight trillion, five hundred seventy-eight billion, five hundred seventy-eight million, six hundred forty-two thousand, nine hundred fifty-three".