78728533582787 has 8 divisors (see below), whose sum is σ = 90405971578560. Its totient is φ = 67804478683560.

The previous prime is 78728533582757. The next prime is 78728533582843.

78728533582787 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78728533582787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78728533582757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188345773913 + ... + 188345774330.

It is an arithmetic number, because the mean of its divisors is an integer number (11300746447320).

Almost surely, 2^{78728533582787} is an apocalyptic number.

78728533582787 is a deficient number, since it is larger than the sum of its proper divisors (11677437995773).

78728533582787 is a wasteful number, since it uses less digits than its factorization.

78728533582787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376691548273.

The product of its digits is 8851046400, while the sum is 80.

The spelling of 78728533582787 in words is "seventy-eight trillion, seven hundred twenty-eight billion, five hundred thirty-three million, five hundred eighty-two thousand, seven hundred eighty-seven".