134406561623 has 2 divisors, whose sum is σ = 134406561624. Its totient is φ = 134406561622.

The previous prime is 134406561587. The next prime is 134406561631. The reversal of 134406561623 is 326165604431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 134406561623 - 2¹⁰ = 134406560599 is a prime.

It is a super-3 number, since 3×134406561623³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134406561683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67203280811 + 67203280812.

It is an arithmetic number, because the mean of its divisors is an integer number (67203280812).

Almost surely, 2^134406561623 is an apocalyptic number.

134406561623 is a deficient number, since it is larger than the sum of its proper divisors (1).

134406561623 is an equidigital number, since it uses as much as digits as its factorization.

134406561623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 134406561623 in words is "one hundred thirty-four billion, four hundred six million, five hundred sixty-one thousand, six hundred twenty-three".