78438700735 has 8 divisors (see below), whose sum is σ = 94128471360. Its totient is φ = 62749606944.

The previous prime is 78438700643. The next prime is 78438700751. The reversal of 78438700735 is 53700783487.

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-78438700735 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135709 + ... + 418681.

It is an arithmetic number, because the mean of its divisors is an integer number (11766058920).

Almost surely, 2^78438700735 is an apocalyptic number.

78438700735 is a deficient number, since it is larger than the sum of its proper divisors (15689770625).

78438700735 is a wasteful number, since it uses less digits than its factorization.

78438700735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338417.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 78438700735 in words is "seventy-eight billion, four hundred thirty-eight million, seven hundred thousand, seven hundred thirty-five".