6420106828831 has 2 divisors, whose sum is σ = 6420106828832. Its totient is φ = 6420106828830.

The previous prime is 6420106828769. The next prime is 6420106828859. The reversal of 6420106828831 is 1388286010246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6420106828831 - 2²⁹ = 6419569957919 is a prime.

It is a super-2 number, since 2×6420106828831² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6420106828931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210053414415 + 3210053414416.

It is an arithmetic number, because the mean of its divisors is an integer number (3210053414416).

Almost surely, 2^{6420106828831} is an apocalyptic number.

6420106828831 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420106828831 is an equidigital number, since it uses as much as digits as its factorization.

6420106828831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 6420106828831 in words is "six trillion, four hundred twenty billion, one hundred six million, eight hundred twenty-eight thousand, eight hundred thirty-one".