4006621625 has 16 divisors (see below), whose sum is σ = 5294399760. Its totient is φ = 3016748800.

The previous prime is 4006621609. The next prime is 4006621667. The reversal of 4006621625 is 5261266004.

It can be written as a sum of positive squares in 8 ways, for example, as 1374110761 + 2632510864 = 37069^2 + 51308^2 .

It is not a de Polignac number, because 4006621625 - 2⁴ = 4006621609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4006621591 and 4006621600.

It is an unprimeable number.

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, 940610 + ... + 944859.

It is an arithmetic number, because the mean of its divisors is an integer number (330899985).

Almost surely, 2^4006621625 is an apocalyptic number.

It is an amenable number.

4006621625 is a deficient number, since it is larger than the sum of its proper divisors (1287778135).

4006621625 is a wasteful number, since it uses less digits than its factorization.

4006621625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885501 (or 1885491 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4006621625 is about 63297.8800987837. The cubic root of 4006621625 is about 1588.2765002791.

Adding to 4006621625 its reverse (5261266004), we get a palindrome (9267887629).

The spelling of 4006621625 in words is "four billion, six million, six hundred twenty-one thousand, six hundred twenty-five".