2006621545 has 8 divisors (see below), whose sum is σ = 2512639296. Its totient is φ = 1535501616.

The previous prime is 2006621543. The next prime is 2006621557. The reversal of 2006621545 is 5451266002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2006621545 - 2¹ = 2006621543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2006621543) 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 7 ways as a sum of consecutive naturals, for example, 8724327 + ... + 8724556.

It is an arithmetic number, because the mean of its divisors is an integer number (314079912).

Almost surely, 2^2006621545 is an apocalyptic number.

It is an amenable number.

2006621545 is a deficient number, since it is larger than the sum of its proper divisors (506017751).

2006621545 is a wasteful number, since it uses less digits than its factorization.

2006621545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17448911.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2006621545 is about 44795.3294998485. The cubic root of 2006621545 is about 1261.3099555585.

Adding to 2006621545 its reverse (5451266002), we get a palindrome (7457887547).

The spelling of 2006621545 in words is "two billion, six million, six hundred twenty-one thousand, five hundred forty-five".