78538338310742 has 8 divisors (see below), whose sum is σ = 118706801416632. Its totient is φ = 38969404505200.

The previous prime is 78538338310723. The next prime is 78538338310811. The reversal of 78538338310742 is 24701383383587.

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

It is a super-3 number, since 3×78538338310742³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 149882324759 + ... + 149882325282.

It is an arithmetic number, because the mean of its divisors is an integer number (14838350177079).

Almost surely, 2^{78538338310742} is an apocalyptic number.

78538338310742 is a deficient number, since it is larger than the sum of its proper divisors (40168463105890).

78538338310742 is a wasteful number, since it uses less digits than its factorization.

78538338310742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299764650174.

The product of its (nonzero) digits is 81285120, while the sum is 62.

The spelling of 78538338310742 in words is "seventy-eight trillion, five hundred thirty-eight billion, three hundred thirty-eight million, three hundred ten thousand, seven hundred forty-two".