78515138046 has 32 divisors (see below), whose sum is σ = 161426539008. Its totient is φ = 25440337440.

The previous prime is 78515138029. The next prime is 78515138057. The reversal of 78515138046 is 64083151587.

It is a junction number, because it is equal to n+sod(n) for n = 78515137986 and 78515138004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69631 + ... + 402341.

It is an arithmetic number, because the mean of its divisors is an integer number (5044579344).

Almost surely, 2^78515138046 is an apocalyptic number.

78515138046 is an abundant number, since it is smaller than the sum of its proper divisors (82911400962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78515138046 is a wasteful number, since it uses less digits than its factorization.

78515138046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333816.

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 78515138046 in words is "seventy-eight billion, five hundred fifteen million, one hundred thirty-eight thousand, forty-six".