1440146155 has 16 divisors (see below), whose sum is σ = 1976103360. Its totient is φ = 987005952.

The previous prime is 1440146131. The next prime is 1440146159. The reversal of 1440146155 is 5516410441.

It is a cyclic number.

It is not a de Polignac number, because 1440146155 - 2⁷ = 1440146027 is a prime.

It is a super-2 number, since 2×1440146155² = 4148041895522568050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1440146159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63267 + ... + 82963.

It is an arithmetic number, because the mean of its divisors is an integer number (123506460).

Almost surely, 2^1440146155 is an apocalyptic number.

1440146155 is a deficient number, since it is larger than the sum of its proper divisors (535957205).

1440146155 is a wasteful number, since it uses less digits than its factorization.

1440146155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21798.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1440146155 is about 37949.2576343728. The cubic root of 1440146155 is about 1129.2814381205.

Adding to 1440146155 its reverse (5516410441), we get a palindrome (6956556596).

The spelling of 1440146155 in words is "one billion, four hundred forty million, one hundred forty-six thousand, one hundred fifty-five".