2643631401 has 8 divisors (see below), whose sum is σ = 3527968480. Its totient is φ = 1760857632.

The previous prime is 2643631379. The next prime is 2643631439. The reversal of 2643631401 is 1041363462.

2643631401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2643631401 - 2⁵ = 2643631369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2643641401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386875 + ... + 393648.

It is an arithmetic number, because the mean of its divisors is an integer number (440996060).

Almost surely, 2^2643631401 is an apocalyptic number.

It is an amenable number.

2643631401 is a deficient number, since it is larger than the sum of its proper divisors (884337079).

2643631401 is a wasteful number, since it uses less digits than its factorization.

2643631401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781655.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 2643631401 is about 51416.2561939315. The cubic root of 2643631401 is about 1382.7180556113.

Adding to 2643631401 its reverse (1041363462), we get a palindrome (3684994863).

The spelling of 2643631401 in words is "two billion, six hundred forty-three million, six hundred thirty-one thousand, four hundred one".