621245640411 has 144 divisors (see below), whose sum is σ = 1073456832000. Its totient is φ = 354769541280.

The previous prime is 621245640409. The next prime is 621245640523. The reversal of 621245640411 is 114046542126.

621245640411 is a `hidden beast` number, since 6 + 2 + 1 + 2 + 4 + 5 + 640 + 4 + 1 + 1 = 666.

It is not a de Polignac number, because 621245640411 - 2¹ = 621245640409 is a prime.

It is a super-2 number, since 2×621245640411² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621245640401) by changing a digit.

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 143 ways as a sum of consecutive naturals, for example, 234696690 + ... + 234699336.

Almost surely, 2^621245640411 is an apocalyptic number.

621245640411 is a deficient number, since it is larger than the sum of its proper divisors (452211191589).

621245640411 is a wasteful number, since it uses less digits than its factorization.

621245640411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915 (or 2879 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 621245640411 in words is "six hundred twenty-one billion, two hundred forty-five million, six hundred forty thousand, four hundred eleven".