6401630930 has 16 divisors (see below), whose sum is σ = 11538091224. Its totient is φ = 2557284480.

The previous prime is 6401630929. The next prime is 6401630941. The reversal of 6401630930 is 390361046.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5151937729 + 1249693201 = 71777^2 + 35351^2 .

It is a super-3 number, since 3×6401630930³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412997 + ... + 428216.

Almost surely, 2^6401630930 is an apocalyptic number.

6401630930 is a deficient number, since it is larger than the sum of its proper divisors (5136460294).

6401630930 is a wasteful number, since it uses less digits than its factorization.

6401630930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841981.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 6401630930 is about 80010.1926631851. The cubic root of 6401630930 is about 1856.7932306020.

Adding to 6401630930 its reverse (390361046), we get a palindrome (6791991976).

The spelling of 6401630930 in words is "six billion, four hundred one million, six hundred thirty thousand, nine hundred thirty".