6451630 has 16 divisors (see below), whose sum is σ = 12013920. Its totient is φ = 2491552.

The previous prime is 6451609. The next prime is 6451633. The reversal of 6451630 is 361546.

It is a junction number, because it is equal to n+sod(n) for n = 6451595 and 6451604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451633) 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, 10834 + ... + 11413.

It is an arithmetic number, because the mean of its divisors is an integer number (750870).

Almost surely, 2^6451630 is an apocalyptic number.

6451630 is a deficient number, since it is larger than the sum of its proper divisors (5562290).

6451630 is a wasteful number, since it uses less digits than its factorization.

6451630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22283.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6451630 is about 2540.0059055049. The cubic root of 6451630 is about 186.1614776845.

It can be divided in two parts, 64516 and 30, that added together give a palindrome (64546).

The spelling of 6451630 in words is "six million, four hundred fifty-one thousand, six hundred thirty".