78538362387727 has 16 divisors (see below), whose sum is σ = 87029516738304. Its totient is φ = 70275771720000.

The previous prime is 78538362387697. The next prime is 78538362387827. The reversal of 78538362387727 is 72778326383587.

It is a de Polignac number, because none of the positive numbers 2^k-78538362387727 is a prime.

It is a super-3 number, since 3×78538362387727³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78538362387827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83192253 + ... + 84131014.

It is an arithmetic number, because the mean of its divisors is an integer number (5439344796144).

Almost surely, 2^{78538362387727} is an apocalyptic number.

78538362387727 is a deficient number, since it is larger than the sum of its proper divisors (8491154350577).

78538362387727 is a wasteful number, since it uses less digits than its factorization.

78538362387727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167323950.

The product of its digits is 3982970880, while the sum is 76.

The spelling of 78538362387727 in words is "seventy-eight trillion, five hundred thirty-eight billion, three hundred sixty-two million, three hundred eighty-seven thousand, seven hundred twenty-seven".