144777778 has 12 divisors (see below), whose sum is σ = 227020878. Its totient is φ = 69241040.

The previous prime is 144777767. The next prime is 144777793. The reversal of 144777778 is 877777441.

144777778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 111450249 + 33327529 = 10557^2 + 5773^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67363 + ... + 69478.

Almost surely, 2^144777778 is an apocalyptic number.

144777778 is a deficient number, since it is larger than the sum of its proper divisors (82243100).

144777778 is a wasteful number, since it uses less digits than its factorization.

144777778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136889 (or 136866 counting only the distinct ones).

The product of its digits is 2151296, while the sum is 52.

The square root of 144777778 is about 12032.3637744211. The cubic root of 144777778 is about 525.0902677741.

The spelling of 144777778 in words is "one hundred forty-four million, seven hundred seventy-seven thousand, seven hundred seventy-eight".