1628275545 has 24 divisors (see below), whose sum is σ = 3039448776. Its totient is φ = 801612288.

The previous prime is 1628275543. The next prime is 1628275553. The reversal of 1628275545 is 5455728261.

1628275545 is a `hidden beast` number, since 16 + 2 + 82 + 7 + 554 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 84492864 + 1543782681 = 9192^2 + 39291^2 .

It is not a de Polignac number, because 1628275545 - 2¹ = 1628275543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1628275545.

It is not an unprimeable number, because it can be changed into a prime (1628275541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1391104 + ... + 1392273.

It is an arithmetic number, because the mean of its divisors is an integer number (126643699).

Almost surely, 2^1628275545 is an apocalyptic number.

1628275545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1628275545 is a deficient number, since it is larger than the sum of its proper divisors (1411173231).

1628275545 is a wasteful number, since it uses less digits than its factorization.

1628275545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783401 (or 2783398 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 1628275545 is about 40351.8964238361. The cubic root of 1628275545 is about 1176.4567524150.

The spelling of 1628275545 in words is "one billion, six hundred twenty-eight million, two hundred seventy-five thousand, five hundred forty-five".