135623450461 has 2 divisors, whose sum is σ = 135623450462. Its totient is φ = 135623450460.

The previous prime is 135623450407. The next prime is 135623450471. The reversal of 135623450461 is 164054326531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124904989561 + 10718460900 = 353419^2 + 103530^2 .

It is a cyclic number.

It is not a de Polignac number, because 135623450461 - 2¹⁵ = 135623417693 is a prime.

It is a super-2 number, since 2×135623450461² (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 (135623450471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67811725230 + 67811725231.

It is an arithmetic number, because the mean of its divisors is an integer number (67811725231).

Almost surely, 2^135623450461 is an apocalyptic number.

It is an amenable number.

135623450461 is a deficient number, since it is larger than the sum of its proper divisors (1).

135623450461 is an equidigital number, since it uses as much as digits as its factorization.

135623450461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 135623450461 its reverse (164054326531), we get a palindrome (299677776992).

The spelling of 135623450461 in words is "one hundred thirty-five billion, six hundred twenty-three million, four hundred fifty thousand, four hundred sixty-one".