6451710421 has 16 divisors (see below), whose sum is σ = 7243181568. Its totient is φ = 5706216000.

The previous prime is 6451710389. The next prime is 6451710457. The reversal of 6451710421 is 1240171546.

It is a cyclic number.

It is not a de Polignac number, because 6451710421 - 2⁵ = 6451710389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451710491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38551 + ... + 119956.

It is an arithmetic number, because the mean of its divisors is an integer number (452698848).

Almost surely, 2^6451710421 is an apocalyptic number.

It is an amenable number.

6451710421 is a deficient number, since it is larger than the sum of its proper divisors (791471147).

6451710421 is a wasteful number, since it uses less digits than its factorization.

6451710421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158652.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 6451710421 is about 80322.5399312049. The cubic root of 6451710421 is about 1861.6225119597.

Adding to 6451710421 its reverse (1240171546), we get a palindrome (7691881967).

The spelling of 6451710421 in words is "six billion, four hundred fifty-one million, seven hundred ten thousand, four hundred twenty-one".