2543643401 has 8 divisors (see below), whose sum is σ = 2765904960. Its totient is φ = 2325181392.

The previous prime is 2543643397. The next prime is 2543643413. The reversal of 2543643401 is 1043463452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2543643401 - 2² = 2543643397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2543643451) 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 7 ways as a sum of consecutive naturals, for example, 948491 + ... + 951168.

It is an arithmetic number, because the mean of its divisors is an integer number (345738120).

Almost surely, 2^2543643401 is an apocalyptic number.

It is an amenable number.

2543643401 is a deficient number, since it is larger than the sum of its proper divisors (222261559).

2543643401 is a wasteful number, since it uses less digits than its factorization.

2543643401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899775.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 2543643401 is about 50434.5457102570. The cubic root of 2543643401 is about 1365.0610519818.

The spelling of 2543643401 in words is "two billion, five hundred forty-three million, six hundred forty-three thousand, four hundred one".