78518573623 has 8 divisors (see below), whose sum is σ = 89737224192. Its totient is φ = 67300350936.

The previous prime is 78518573611. The next prime is 78518573629. The reversal of 78518573623 is 32637581587.

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

It is not a de Polignac number, because 78518573623 - 2²⁵ = 78485019191 is a prime.

It is a super-2 number, since 2×78518573623² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78518573629) 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, 582786 + ... + 704752.

It is an arithmetic number, because the mean of its divisors is an integer number (11217153024).

Almost surely, 2^78518573623 is an apocalyptic number.

78518573623 is a deficient number, since it is larger than the sum of its proper divisors (11218650569).

78518573623 is a wasteful number, since it uses less digits than its factorization.

78518573623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213941.

The product of its digits is 8467200, while the sum is 55.

The spelling of 78518573623 in words is "seventy-eight billion, five hundred eighteen million, five hundred seventy-three thousand, six hundred twenty-three".