78105071 has 16 divisors (see below), whose sum is σ = 88649088. Its totient is φ = 68191200.

The previous prime is 78105059. The next prime is 78105103. The reversal of 78105071 is 17050187.

It is not a de Polignac number, because 78105071 - 2⁶ = 78105007 is a prime.

It is a super-2 number, since 2×78105071² = 12200804231830082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78105011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27500 + ... + 30206.

It is an arithmetic number, because the mean of its divisors is an integer number (5540568).

Almost surely, 2^78105071 is an apocalyptic number.

78105071 is a deficient number, since it is larger than the sum of its proper divisors (10544017).

78105071 is a wasteful number, since it uses less digits than its factorization.

78105071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822.

The product of its (nonzero) digits is 1960, while the sum is 29.

The square root of 78105071 is about 8837.7073384447. The cubic root of 78105071 is about 427.4576335932.

The spelling of 78105071 in words is "seventy-eight million, one hundred five thousand, seventy-one".