4121644681 has 16 divisors (see below), whose sum is σ = 5140085760. Its totient is φ = 3210788880.

The previous prime is 4121644661. The next prime is 4121644687. The reversal of 4121644681 is 1864461214.

4121644681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 4121644681 - 2¹³ = 4121636489 is a prime.

It is a super-2 number, since 2×4121644681² = 33975909752831183522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4121644681.

It is not an unprimeable number, because it can be changed into a prime (4121644687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505620 + ... + 513706.

It is an arithmetic number, because the mean of its divisors is an integer number (321255360).

Almost surely, 2^4121644681 is an apocalyptic number.

It is an amenable number.

4121644681 is a deficient number, since it is larger than the sum of its proper divisors (1018441079).

4121644681 is a wasteful number, since it uses less digits than its factorization.

4121644681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14724.

The product of its digits is 36864, while the sum is 37.

The square root of 4121644681 is about 64200.0364563759. The cubic root of 4121644681 is about 1603.3322066037.

The spelling of 4121644681 in words is "four billion, one hundred twenty-one million, six hundred forty-four thousand, six hundred eighty-one".