133618236461 has 2 divisors, whose sum is σ = 133618236462. Its totient is φ = 133618236460.

The previous prime is 133618236439. The next prime is 133618236523. The reversal of 133618236461 is 164632816331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107246425225 + 26371811236 = 327485^2 + 162394^2 .

It is a cyclic number.

It is not a de Polignac number, because 133618236461 - 2¹⁰ = 133618235437 is a prime.

It is a super-2 number, since 2×133618236461² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133618236061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66809118230 + 66809118231.

It is an arithmetic number, because the mean of its divisors is an integer number (66809118231).

Almost surely, 2^133618236461 is an apocalyptic number.

It is an amenable number.

133618236461 is a deficient number, since it is larger than the sum of its proper divisors (1).

133618236461 is an equidigital number, since it uses as much as digits as its factorization.

133618236461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The spelling of 133618236461 in words is "one hundred thirty-three billion, six hundred eighteen million, two hundred thirty-six thousand, four hundred sixty-one".