6420360631 has 2 divisors, whose sum is σ = 6420360632. Its totient is φ = 6420360630.

The previous prime is 6420360613. The next prime is 6420360637. The reversal of 6420360631 is 1360630246.

Together with previous prime (6420360613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6420360631 - 2⁹ = 6420360119 is a prime.

It is a super-2 number, since 2×6420360631² = 82442061264189436322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6420360593 and 6420360602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6420360637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210180315 + 3210180316.

It is an arithmetic number, because the mean of its divisors is an integer number (3210180316).

Almost surely, 2^6420360631 is an apocalyptic number.

6420360631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420360631 is an equidigital number, since it uses as much as digits as its factorization.

6420360631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 6420360631 is about 80127.1528946337. The cubic root of 6420360631 is about 1858.6023175232.

Adding to 6420360631 its reverse (1360630246), we get a palindrome (7780990877).

The spelling of 6420360631 in words is "six billion, four hundred twenty million, three hundred sixty thousand, six hundred thirty-one".