1440346545 has 48 divisors (see below), whose sum is σ = 2797209792. Its totient is φ = 679466880.

The previous prime is 1440346517. The next prime is 1440346597. The reversal of 1440346545 is 5456430441.

It is not a de Polignac number, because 1440346545 - 2⁵ = 1440346513 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21007 + ... + 57636.

It is an arithmetic number, because the mean of its divisors is an integer number (58275204).

Almost surely, 2^1440346545 is an apocalyptic number.

1440346545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440346545 is a deficient number, since it is larger than the sum of its proper divisors (1356863247).

1440346545 is a wasteful number, since it uses less digits than its factorization.

1440346545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78702 (or 78699 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 1440346545 is about 37951.8977786355. The cubic root of 1440346545 is about 1129.3338138722. Note that the first 3 decimals are identical.

Adding to 1440346545 its reverse (5456430441), we get a palindrome (6896776986).

The spelling of 1440346545 in words is "one billion, four hundred forty million, three hundred forty-six thousand, five hundred forty-five".