846788656409 has 2 divisors, whose sum is σ = 846788656410. Its totient is φ = 846788656408.

The previous prime is 846788656339. The next prime is 846788656423. The reversal of 846788656409 is 904656887648.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734963290000 + 111825366409 = 857300^2 + 334403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-846788656409 is a prime.

It is not a weakly prime, because it can be changed into another prime (846788656489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423394328204 + 423394328205.

It is an arithmetic number, because the mean of its divisors is an integer number (423394328205).

Almost surely, 2^846788656409 is an apocalyptic number.

It is an amenable number.

846788656409 is a deficient number, since it is larger than the sum of its proper divisors (1).

846788656409 is an equidigital number, since it uses as much as digits as its factorization.

846788656409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 557383680, while the sum is 71.

The spelling of 846788656409 in words is "eight hundred forty-six billion, seven hundred eighty-eight million, six hundred fifty-six thousand, four hundred nine".