78515487145756 has 12 divisors (see below), whose sum is σ = 137402231974560. Its totient is φ = 39257706581600.

The previous prime is 78515487145721. The next prime is 78515487145763. The reversal of 78515487145756 is 65754178451587.

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, 4161241 + ... + 13204048.

It is an arithmetic number, because the mean of its divisors is an integer number (11450185997880).

Almost surely, 2^{78515487145756} is an apocalyptic number.

It is an amenable number.

78515487145756 is a deficient number, since it is larger than the sum of its proper divisors (58886744828804).

78515487145756 is a wasteful number, since it uses less digits than its factorization.

78515487145756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495644 (or 18495642 counting only the distinct ones).

The product of its digits is 1317120000, while the sum is 73.

The spelling of 78515487145756 in words is "seventy-eight trillion, five hundred fifteen billion, four hundred eighty-seven million, one hundred forty-five thousand, seven hundred fifty-six".