656264646419 has 2 divisors, whose sum is σ = 656264646420. Its totient is φ = 656264646418.

The previous prime is 656264646409. The next prime is 656264646421. The reversal of 656264646419 is 914646462656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656264646419 is a prime.

It is a super-2 number, since 2×656264646419² (a number of 24 digits) contains 22 as substring.

Together with 656264646421, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (656264646409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328132323209 + 328132323210.

It is an arithmetic number, because the mean of its divisors is an integer number (328132323210).

Almost surely, 2^656264646419 is an apocalyptic number.

656264646419 is a deficient number, since it is larger than the sum of its proper divisors (1).

656264646419 is an equidigital number, since it uses as much as digits as its factorization.

656264646419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 59.

The spelling of 656264646419 in words is "six hundred fifty-six billion, two hundred sixty-four million, six hundred forty-six thousand, four hundred nineteen".