621118641 has 32 divisors (see below), whose sum is σ = 974719872. Its totient is φ = 346844160.

The previous prime is 621118627. The next prime is 621118651. The reversal of 621118641 is 146811126.

It is not a de Polignac number, because 621118641 - 2⁷ = 621118513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621118599 and 621118608.

It is not an unprimeable number, because it can be changed into a prime (621118621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330681 + ... + 332553.

It is an arithmetic number, because the mean of its divisors is an integer number (30459996).

Almost surely, 2^621118641 is an apocalyptic number.

It is an amenable number.

621118641 is a deficient number, since it is larger than the sum of its proper divisors (353601231).

621118641 is a wasteful number, since it uses less digits than its factorization.

621118641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673.

The product of its digits is 2304, while the sum is 30.

The square root of 621118641 is about 24922.2519247359. The cubic root of 621118641 is about 853.2144220937.

Adding to 621118641 its reverse (146811126), we get a palindrome (767929767).

The spelling of 621118641 in words is "six hundred twenty-one million, one hundred eighteen thousand, six hundred forty-one".