78875742706388 has 144 divisors (see below), whose sum is σ = 153120536687664. Its totient is φ = 35423758540800.

The previous prime is 78875742706363. The next prime is 78875742706393. The reversal of 78875742706388 is 88360724757887.

It can be written as a sum of positive squares in 24 ways, for example, as 18190583261764 + 60685159444624 = 4265042^2 + 7790068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3540669506 + ... + 3540691782.

It is an arithmetic number, because the mean of its divisors is an integer number (1063337060331).

Almost surely, 2^{78875742706388} is an apocalyptic number.

It is an amenable number.

78875742706388 is a deficient number, since it is larger than the sum of its proper divisors (74244793981276).

78875742706388 is a wasteful number, since it uses less digits than its factorization.

78875742706388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23070 (or 23039 counting only the distinct ones).

The product of its (nonzero) digits is 7080837120, while the sum is 80.

The spelling of 78875742706388 in words is "seventy-eight trillion, eight hundred seventy-five billion, seven hundred forty-two million, seven hundred six thousand, three hundred eighty-eight".