78515138047 has 8 divisors (see below), whose sum is σ = 81947693520. Its totient is φ = 75154847040.

The previous prime is 78515138029. The next prime is 78515138057. The reversal of 78515138047 is 74083151587.

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

It is a cyclic number.

It is not a de Polignac number, because 78515138047 - 2³⁵ = 44155399679 is a prime.

It is a Duffinian number.

78515138047 is a modest number, since divided by 138047 gives 78515 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78515138017) 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, 18063897 + ... + 18068242.

It is an arithmetic number, because the mean of its divisors is an integer number (10243461690).

Almost surely, 2^78515138047 is an apocalyptic number.

78515138047 is a deficient number, since it is larger than the sum of its proper divisors (3432555473).

78515138047 is a wasteful number, since it uses less digits than its factorization.

78515138047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36132233.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 78515138047 in words is "seventy-eight billion, five hundred fifteen million, one hundred thirty-eight thousand, forty-seven".