523161166501111 has 2 divisors, whose sum is σ = 523161166501112. Its totient is φ = 523161166501110.

The previous prime is 523161166501091. The next prime is 523161166501223. The reversal of 523161166501111 is 111105661161325.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 523161166501111 - 2¹⁷ = 523161166370039 is a prime.

It is a super-2 number, since 2×523161166501111² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523161166505111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261580583250555 + 261580583250556.

It is an arithmetic number, because the mean of its divisors is an integer number (261580583250556).

Almost surely, 2^{523161166501111} is an apocalyptic number.

523161166501111 is a deficient number, since it is larger than the sum of its proper divisors (1).

523161166501111 is an equidigital number, since it uses as much as digits as its factorization.

523161166501111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 523161166501111 in words is "five hundred twenty-three trillion, one hundred sixty-one billion, one hundred sixty-six million, five hundred one thousand, one hundred eleven".