78145475 has 6 divisors (see below), whose sum is σ = 96900420. Its totient is φ = 62516360.

The previous prime is 78145439. The next prime is 78145523. The reversal of 78145475 is 57454187.

It is not a de Polignac number, because 78145475 - 2⁶ = 78145411 is a prime.

It is a super-2 number, since 2×78145475² = 12213430525951250, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1562885 + ... + 1562934.

It is an arithmetic number, because the mean of its divisors is an integer number (16150070).

Almost surely, 2^78145475 is an apocalyptic number.

78145475 is a deficient number, since it is larger than the sum of its proper divisors (18754945).

78145475 is a wasteful number, since it uses less digits than its factorization.

78145475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125829 (or 3125824 counting only the distinct ones).

The product of its digits is 156800, while the sum is 41.

The square root of 78145475 is about 8839.9929298614. The cubic root of 78145475 is about 427.5313292818.

The spelling of 78145475 in words is "seventy-eight million, one hundred forty-five thousand, four hundred seventy-five".