133165426505623 has 2 divisors, whose sum is σ = 133165426505624. Its totient is φ = 133165426505622.

The previous prime is 133165426505599. The next prime is 133165426505677. The reversal of 133165426505623 is 326505624561331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133165426505623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133165426502623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66582713252811 + 66582713252812.

It is an arithmetic number, because the mean of its divisors is an integer number (66582713252812).

Almost surely, 2^{133165426505623} is an apocalyptic number.

133165426505623 is a deficient number, since it is larger than the sum of its proper divisors (1).

133165426505623 is an equidigital number, since it uses as much as digits as its factorization.

133165426505623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 52.

The spelling of 133165426505623 in words is "one hundred thirty-three trillion, one hundred sixty-five billion, four hundred twenty-six million, five hundred five thousand, six hundred twenty-three".