78242439524205 has 96 divisors (see below), whose sum is σ = 138101310547200. Its totient is φ = 37798589931520.

The previous prime is 78242439524173. The next prime is 78242439524239. The reversal of 78242439524205 is 50242593424287.

It is not a de Polignac number, because 78242439524205 - 2⁵ = 78242439524173 is a prime.

It is a super-2 number, since 2×78242439524205² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 792929611 + ... + 793028279.

It is an arithmetic number, because the mean of its divisors is an integer number (1438555318200).

Almost surely, 2^{78242439524205} is an apocalyptic number.

It is an amenable number.

78242439524205 is a deficient number, since it is larger than the sum of its proper divisors (59858871022995).

78242439524205 is a wasteful number, since it uses less digits than its factorization.

78242439524205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100275 (or 100264 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 57.

The spelling of 78242439524205 in words is "seventy-eight trillion, two hundred forty-two billion, four hundred thirty-nine million, five hundred twenty-four thousand, two hundred five".