78515138048 has 40 divisors (see below), whose sum is σ = 156982296240. Its totient is φ = 39231201280.

The previous prime is 78515138029. The next prime is 78515138057. The reversal of 78515138048 is 84083151587.

It is a junction number, because it is equal to n+sod(n) for n = 78515137987 and 78515138005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722888 + ... + 824376.

It is an arithmetic number, because the mean of its divisors is an integer number (3924557406).

Almost surely, 2^78515138048 is an apocalyptic number.

It is an amenable number.

78515138048 is a deficient number, since it is larger than the sum of its proper divisors (78467158192).

78515138048 is a wasteful number, since it uses less digits than its factorization.

78515138048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103018 (or 103002 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 50.

The spelling of 78515138048 in words is "seventy-eight billion, five hundred fifteen million, one hundred thirty-eight thousand, forty-eight".