154505521253 has 2 divisors, whose sum is σ = 154505521254. Its totient is φ = 154505521252.

The previous prime is 154505521249. The next prime is 154505521267. The reversal of 154505521253 is 352125505451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149043867844 + 5461653409 = 386062^2 + 73903^2 .

It is a cyclic number.

It is not a de Polignac number, because 154505521253 - 2² = 154505521249 is a prime.

It is a super-2 number, since 2×154505521253² (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 (154505521213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77252760626 + 77252760627.

It is an arithmetic number, because the mean of its divisors is an integer number (77252760627).

Almost surely, 2^154505521253 is an apocalyptic number.

It is an amenable number.

154505521253 is a deficient number, since it is larger than the sum of its proper divisors (1).

154505521253 is an equidigital number, since it uses as much as digits as its factorization.

154505521253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 154505521253 in words is "one hundred fifty-four billion, five hundred five million, five hundred twenty-one thousand, two hundred fifty-three".