1545455665 has 16 divisors (see below), whose sum is σ = 1998774288. Its totient is φ = 1140362496.

The previous prime is 1545455663. The next prime is 1545455671. The reversal of 1545455665 is 5665545451.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 106998336 + 1438457329 = 10344^2 + 37927^2 .

It is not a de Polignac number, because 1545455665 - 2¹ = 1545455663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1545455663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80587 + ... + 97903.

It is an arithmetic number, because the mean of its divisors is an integer number (124923393).

Almost surely, 2^1545455665 is an apocalyptic number.

It is an amenable number.

1545455665 is a deficient number, since it is larger than the sum of its proper divisors (453318623).

1545455665 is a wasteful number, since it uses less digits than its factorization.

1545455665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18708.

The product of its digits is 1800000, while the sum is 46.

The square root of 1545455665 is about 39312.2838944776. The cubic root of 1545455665 is about 1156.1624235983.

The spelling of 1545455665 in words is "one billion, five hundred forty-five million, four hundred fifty-five thousand, six hundred sixty-five".