78146845 has 16 divisors (see below), whose sum is σ = 108126720. Its totient is φ = 53109504.

The previous prime is 78146843. The next prime is 78146863. The reversal of 78146845 is 54864187.

It is not a de Polignac number, because 78146845 - 2¹ = 78146843 is a prime.

It is a super-2 number, since 2×78146845² = 12213858766908050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78146843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5925 + ... + 13834.

It is an arithmetic number, because the mean of its divisors is an integer number (6757920).

Almost surely, 2^78146845 is an apocalyptic number.

It is an amenable number.

78146845 is a deficient number, since it is larger than the sum of its proper divisors (29979875).

78146845 is a wasteful number, since it uses less digits than its factorization.

78146845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19884.

The product of its digits is 215040, while the sum is 43.

The square root of 78146845 is about 8840.0704182716. The cubic root of 78146845 is about 427.5338276755.

The spelling of 78146845 in words is "seventy-eight million, one hundred forty-six thousand, eight hundred forty-five".