78534633573 has 24 divisors (see below), whose sum is σ = 130264786080. Its totient is φ = 45091654560.

The previous prime is 78534633563. The next prime is 78534633607. The reversal of 78534633573 is 37533643587.

78534633573 is a `hidden beast` number, since 7 + 8 + 5 + 3 + 4 + 63 + 3 + 573 = 666.

It is not a de Polignac number, because 78534633573 - 2¹⁰ = 78534632549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78534633533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20873886 + ... + 20877647.

It is an arithmetic number, because the mean of its divisors is an integer number (5427699420).

Almost surely, 2^78534633573 is an apocalyptic number.

It is an amenable number.

78534633573 is a deficient number, since it is larger than the sum of its proper divisors (51730152507).

78534633573 is a wasteful number, since it uses less digits than its factorization.

78534633573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41751569 (or 41751566 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 54.

The spelling of 78534633573 in words is "seventy-eight billion, five hundred thirty-four million, six hundred thirty-three thousand, five hundred seventy-three".