78338111055 has 32 divisors (see below), whose sum is σ = 127980103680. Its totient is φ = 40909735680.

The previous prime is 78338111011. The next prime is 78338111083. The reversal of 78338111055 is 55011183387.

It is not a de Polignac number, because 78338111055 - 2¹⁴ = 78338094671 is a prime.

It is a super-2 number, since 2×78338111055² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78338110998 and 78338111016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147351 + ... + 422360.

It is an arithmetic number, because the mean of its divisors is an integer number (3999378240).

Almost surely, 2^78338111055 is an apocalyptic number.

78338111055 is a deficient number, since it is larger than the sum of its proper divisors (49641992625).

78338111055 is a wasteful number, since it uses less digits than its factorization.

78338111055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569911.

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 78338111055 in words is "seventy-eight billion, three hundred thirty-eight million, one hundred eleven thousand, fifty-five".