78427583453 has 4 divisors (see below), whose sum is σ = 78591315840. Its totient is φ = 78263851068.

The previous prime is 78427583419. The next prime is 78427583489. The reversal of 78427583453 is 35438572487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35438572487 = 17 ⋅2084621911.

It is a cyclic number.

It is not a de Polignac number, because 78427583453 - 2⁸ = 78427583197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78427586453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81865475 + ... + 81866432.

It is an arithmetic number, because the mean of its divisors is an integer number (19647828960).

Almost surely, 2^78427583453 is an apocalyptic number.

It is an amenable number.

78427583453 is a deficient number, since it is larger than the sum of its proper divisors (163732387).

78427583453 is a wasteful number, since it uses less digits than its factorization.

78427583453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163732386.

The product of its digits is 22579200, while the sum is 56.

The spelling of 78427583453 in words is "seventy-eight billion, four hundred twenty-seven million, five hundred eighty-three thousand, four hundred fifty-three".