78453455447809 has 8 divisors (see below), whose sum is σ = 84492118372032. Its totient is φ = 72415332771600.

The previous prime is 78453455447803. The next prime is 78453455447831. The reversal of 78453455447809 is 90874455435487.

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

It is not a de Polignac number, because 78453455447809 - 2²⁵ = 78453421893377 is a prime.

It is a super-3 number, since 3×78453455447809³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78453455447803) 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, 134760367 + ... + 135341284.

It is an arithmetic number, because the mean of its divisors is an integer number (10561514796504).

Almost surely, 2^{78453455447809} is an apocalyptic number.

It is an amenable number.

78453455447809 is a deficient number, since it is larger than the sum of its proper divisors (6038662924223).

78453455447809 is a wasteful number, since it uses less digits than its factorization.

78453455447809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270124007.

The product of its (nonzero) digits is 2709504000, while the sum is 73.

The spelling of 78453455447809 in words is "seventy-eight trillion, four hundred fifty-three billion, four hundred fifty-five million, four hundred forty-seven thousand, eight hundred nine".