1545444555 has 16 divisors (see below), whose sum is σ = 2474678304. Its totient is φ = 823581440.

The previous prime is 1545444541. The next prime is 1545444557. The reversal of 1545444555 is 5554445451.

It is a happy number.

It is not a de Polignac number, because 1545444555 - 2²² = 1541250251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1545444557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21186 + ... + 59495.

It is an arithmetic number, because the mean of its divisors is an integer number (154667394).

Almost surely, 2^1545444555 is an apocalyptic number.

1545444555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1545444555 is a deficient number, since it is larger than the sum of its proper divisors (929233749).

1545444555 is a wasteful number, since it uses less digits than its factorization.

1545444555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81966.

The product of its digits is 800000, while the sum is 42.

The square root of 1545444555 is about 39312.1425897902. The cubic root of 1545444555 is about 1156.1596531111.

The spelling of 1545444555 in words is "one billion, five hundred forty-five million, four hundred forty-four thousand, five hundred fifty-five".