78512157340 has 12 divisors (see below), whose sum is σ = 164875530456. Its totient is φ = 31404862928.

The previous prime is 78512157331. The next prime is 78512157341. The reversal of 78512157340 is 4375121587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78512157341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1962803914 + ... + 1962803953.

It is an arithmetic number, because the mean of its divisors is an integer number (13739627538).

Almost surely, 2^78512157340 is an apocalyptic number.

It is an amenable number.

78512157340 is an abundant number, since it is smaller than the sum of its proper divisors (86363373116).

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

78512157340 is a wasteful number, since it uses less digits than its factorization.

78512157340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925607876 (or 3925607874 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 78512157340 in words is "seventy-eight billion, five hundred twelve million, one hundred fifty-seven thousand, three hundred forty".