145775778 has 16 divisors (see below), whose sum is σ = 292630656. Its totient is φ = 48412080.

The previous prime is 145775767. The next prime is 145775783. The reversal of 145775778 is 877577541.

145775778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 145775778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43201 + ... + 46452.

It is an arithmetic number, because the mean of its divisors is an integer number (18289416).

Almost surely, 2^145775778 is an apocalyptic number.

145775778 is an abundant number, since it is smaller than the sum of its proper divisors (146854878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145775778 is a wasteful number, since it uses less digits than its factorization.

145775778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89929.

The product of its digits is 1920800, while the sum is 51.

The square root of 145775778 is about 12073.7640361239. The cubic root of 145775778 is about 526.2940449441.

The spelling of 145775778 in words is "one hundred forty-five million, seven hundred seventy-five thousand, seven hundred seventy-eight".