2006621544 has 16 divisors (see below), whose sum is σ = 5016553920. Its totient is φ = 668873840.

The previous prime is 2006621543. The next prime is 2006621557. The reversal of 2006621544 is 4451266002.

It is not an unprimeable number, because it can be changed into a prime (2006621543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41804592 + ... + 41804639.

It is an arithmetic number, because the mean of its divisors is an integer number (313534620).

Almost surely, 2^2006621544 is an apocalyptic number.

2006621544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2006621544 is an abundant number, since it is smaller than the sum of its proper divisors (3009932376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2006621544 is a wasteful number, since it uses less digits than its factorization.

2006621544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83609240 (or 83609236 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2006621544 is about 44795.3294886867. The cubic root of 2006621544 is about 1261.3099553490.

Adding to 2006621544 its reverse (4451266002), we get a palindrome (6457887546).

The spelling of 2006621544 in words is "two billion, six million, six hundred twenty-one thousand, five hundred forty-four".