154513122064261 has 2 divisors, whose sum is σ = 154513122064262. Its totient is φ = 154513122064260.

The previous prime is 154513122064243. The next prime is 154513122064277. The reversal of 154513122064261 is 162460221315451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144998179827361 + 9514942236900 = 12041519^2 + 3084630^2 .

It is a cyclic number.

It is not a de Polignac number, because 154513122064261 - 2¹⁵ = 154513122031493 is a prime.

It is a super-2 number, since 2×154513122064261² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154513122064291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77256561032130 + 77256561032131.

It is an arithmetic number, because the mean of its divisors is an integer number (77256561032131).

Almost surely, 2^{154513122064261} is an apocalyptic number.

It is an amenable number.

154513122064261 is a deficient number, since it is larger than the sum of its proper divisors (1).

154513122064261 is an equidigital number, since it uses as much as digits as its factorization.

154513122064261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 154513122064261 in words is "one hundred fifty-four trillion, five hundred thirteen billion, one hundred twenty-two million, sixty-four thousand, two hundred sixty-one".