6401634613 has 4 divisors (see below), whose sum is σ = 6983601408. Its totient is φ = 5819667820.

The previous prime is 6401634593. The next prime is 6401634647. The reversal of 6401634613 is 3164361046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6401634613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401634653) 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 3 ways as a sum of consecutive naturals, for example, 290983381 + ... + 290983402.

It is an arithmetic number, because the mean of its divisors is an integer number (1745900352).

Almost surely, 2^6401634613 is an apocalyptic number.

It is an amenable number.

6401634613 is a deficient number, since it is larger than the sum of its proper divisors (581966795).

6401634613 is a wasteful number, since it uses less digits than its factorization.

6401634613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581966794.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 6401634613 is about 80010.2156789994. The cubic root of 6401634613 is about 1856.7935866867.

Adding to 6401634613 its reverse (3164361046), we get a palindrome (9565995659).

The spelling of 6401634613 in words is "six billion, four hundred one million, six hundred thirty-four thousand, six hundred thirteen".