846923161561 has 2 divisors, whose sum is σ = 846923161562. Its totient is φ = 846923161560.

The previous prime is 846923161547. The next prime is 846923161577. The reversal of 846923161561 is 165161329648.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705967967961 + 140955193600 = 840219^2 + 375440^2 .

It is a cyclic number.

It is not a de Polignac number, because 846923161561 - 2¹¹ = 846923159513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 846923161499 and 846923161508.

It is not a weakly prime, because it can be changed into another prime (846923161261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423461580780 + 423461580781.

It is an arithmetic number, because the mean of its divisors is an integer number (423461580781).

Almost surely, 2^846923161561 is an apocalyptic number.

It is an amenable number.

846923161561 is a deficient number, since it is larger than the sum of its proper divisors (1).

846923161561 is an equidigital number, since it uses as much as digits as its factorization.

846923161561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 52.

The spelling of 846923161561 in words is "eight hundred forty-six billion, nine hundred twenty-three million, one hundred sixty-one thousand, five hundred sixty-one".