6401616630 has 32 divisors (see below), whose sum is σ = 15467004000. Its totient is φ = 1695639552.

The previous prime is 6401616593. The next prime is 6401616647. The reversal of 6401616630 is 366161046.

It is a junction number, because it is equal to n+sod(n) for n = 6401616591 and 6401616600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711595 + ... + 720534.

It is an arithmetic number, because the mean of its divisors is an integer number (483343875).

Almost surely, 2^6401616630 is an apocalyptic number.

6401616630 is an abundant number, since it is smaller than the sum of its proper divisors (9065387370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6401616630 is a wasteful number, since it uses less digits than its factorization.

6401616630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432288.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6401616630 is about 80010.1032995209. The cubic root of 6401616630 is about 1856.7918480292.

Adding to 6401616630 its reverse (366161046), we get a palindrome (6767777676).

The spelling of 6401616630 in words is "six billion, four hundred one million, six hundred sixteen thousand, six hundred thirty".