6420610651 has 12 divisors (see below), whose sum is σ = 7945710672. Its totient is φ = 5080042656.

The previous prime is 6420610597. The next prime is 6420610681. The reversal of 6420610651 is 1560160246.

It is not a de Polignac number, because 6420610651 - 2⁹ = 6420610139 is a prime.

It is a super-2 number, since 2×6420610651² = 82448482263469287602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420610681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2712516 + ... + 2714881.

It is an arithmetic number, because the mean of its divisors is an integer number (662142556).

Almost surely, 2^6420610651 is an apocalyptic number.

6420610651 is a deficient number, since it is larger than the sum of its proper divisors (1525100021).

6420610651 is a wasteful number, since it uses less digits than its factorization.

6420610651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427430 (or 5427417 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 6420610651 is about 80128.7130247329. The cubic root of 6420610651 is about 1858.6264429447.

Adding to 6420610651 its reverse (1560160246), we get a palindrome (7980770897).

The spelling of 6420610651 in words is "six billion, four hundred twenty million, six hundred ten thousand, six hundred fifty-one".