523161166501643 has 2 divisors, whose sum is σ = 523161166501644. Its totient is φ = 523161166501642.

The previous prime is 523161166501621. The next prime is 523161166501663. The reversal of 523161166501643 is 346105661161325.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523161166501643 is a prime.

It is a super-2 number, since 2×523161166501643² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523161166501591 and 523161166501600.

It is not a weakly prime, because it can be changed into another prime (523161166501663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261580583250821 + 261580583250822.

It is an arithmetic number, because the mean of its divisors is an integer number (261580583250822).

Almost surely, 2^{523161166501643} is an apocalyptic number.

523161166501643 is a deficient number, since it is larger than the sum of its proper divisors (1).

523161166501643 is an equidigital number, since it uses as much as digits as its factorization.

523161166501643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 523161166501643 in words is "five hundred twenty-three trillion, one hundred sixty-one billion, one hundred sixty-six million, five hundred one thousand, six hundred forty-three".