2401664641 has 4 divisors (see below), whose sum is σ = 2406274884. Its totient is φ = 2397054400.

The previous prime is 2401664621. The next prime is 2401664651. The reversal of 2401664641 is 1464661042.

2401664641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 569824641 + 1831840000 = 23871^2 + 42800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401664641 - 2¹⁵ = 2401631873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2401664597 and 2401664606.

It is not an unprimeable number, because it can be changed into a prime (2401664621) 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, 2304340 + ... + 2305381.

It is an arithmetic number, because the mean of its divisors is an integer number (601568721).

Almost surely, 2^2401664641 is an apocalyptic number.

It is an amenable number.

2401664641 is a deficient number, since it is larger than the sum of its proper divisors (4610243).

2401664641 is an equidigital number, since it uses as much as digits as its factorization.

2401664641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610242.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 2401664641 is about 49006.7815817362. The cubic root of 2401664641 is about 1339.1753746069.

The spelling of 2401664641 in words is "two billion, four hundred one million, six hundred sixty-four thousand, six hundred forty-one".