78281235105 has 16 divisors (see below), whose sum is σ = 127372858560. Its totient is φ = 41042364608.

The previous prime is 78281235091. The next prime is 78281235107. The reversal of 78281235105 is 50153218287.

It is a cyclic number.

It is not a de Polignac number, because 78281235105 - 2⁶ = 78281235041 is a prime.

It is a super-2 number, since 2×78281235105² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78281235107) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 44225802 + ... + 44227571.

It is an arithmetic number, because the mean of its divisors is an integer number (7960803660).

Almost surely, 2^78281235105 is an apocalyptic number.

It is an amenable number.

78281235105 is a deficient number, since it is larger than the sum of its proper divisors (49091623455).

78281235105 is a wasteful number, since it uses less digits than its factorization.

78281235105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88453440.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 78281235105 in words is "seventy-eight billion, two hundred eighty-one million, two hundred thirty-five thousand, one hundred five".