646820000147 has 2 divisors, whose sum is σ = 646820000148. Its totient is φ = 646820000146.

The previous prime is 646820000027. The next prime is 646820000159. The reversal of 646820000147 is 741000028646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646820000147 is a prime.

It is a super-2 number, since 2×646820000147² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646820000147.

It is not a weakly prime, because it can be changed into another prime (646820008147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323410000073 + 323410000074.

It is an arithmetic number, because the mean of its divisors is an integer number (323410000074).

Almost surely, 2^646820000147 is an apocalyptic number.

646820000147 is a deficient number, since it is larger than the sum of its proper divisors (1).

646820000147 is an equidigital number, since it uses as much as digits as its factorization.

646820000147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 646820000147 in words is "six hundred forty-six billion, eight hundred twenty million, one hundred forty-seven", and thus it is an aban number.