78538363820105 has 16 divisors (see below), whose sum is σ = 113378690628480. Its totient is φ = 51020410781952.

The previous prime is 78538363820093. The next prime is 78538363820113. The reversal of 78538363820105 is 50102836383587.

It is a cyclic number.

It is not a de Polignac number, because 78538363820105 - 2¹² = 78538363816009 is a prime.

It is a super-3 number, since 3×78538363820105³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59051400704 + ... + 59051402033.

It is an arithmetic number, because the mean of its divisors is an integer number (7086168164280).

Almost surely, 2^{78538363820105} is an apocalyptic number.

It is an amenable number.

78538363820105 is a deficient number, since it is larger than the sum of its proper divisors (34840326808375).

78538363820105 is a wasteful number, since it uses less digits than its factorization.

78538363820105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118102802768.

The product of its (nonzero) digits is 29030400, while the sum is 59.

The spelling of 78538363820105 in words is "seventy-eight trillion, five hundred thirty-eight billion, three hundred sixty-three million, eight hundred twenty thousand, one hundred five".