78453455447807 has 16 divisors (see below), whose sum is σ = 85627476054432. Its totient is φ = 71286424043520.

The previous prime is 78453455447803. The next prime is 78453455447831. The reversal of 78453455447807 is 70874455435487.

It is a cyclic number.

It is not a de Polignac number, because 78453455447807 - 2² = 78453455447803 is a prime.

It is a super-2 number, since 2×78453455447807² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78453455447803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205229213 + ... + 205611129.

It is an arithmetic number, because the mean of its divisors is an integer number (5351717253402).

Almost surely, 2^{78453455447807} is an apocalyptic number.

78453455447807 is a deficient number, since it is larger than the sum of its proper divisors (7174020606625).

78453455447807 is a wasteful number, since it uses less digits than its factorization.

78453455447807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391018.

The product of its (nonzero) digits is 2107392000, while the sum is 71.

The spelling of 78453455447807 in words is "seventy-eight trillion, four hundred fifty-three billion, four hundred fifty-five million, four hundred forty-seven thousand, eight hundred seven".