145256055661 has 2 divisors, whose sum is σ = 145256055662. Its totient is φ = 145256055660.

The previous prime is 145256055647. The next prime is 145256055683. The reversal of 145256055661 is 166550652541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142736618025 + 2519437636 = 377805^2 + 50194^2 .

It is a cyclic number.

It is not a de Polignac number, because 145256055661 - 2⁵ = 145256055629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145256055631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72628027830 + 72628027831.

It is an arithmetic number, because the mean of its divisors is an integer number (72628027831).

Almost surely, 2^145256055661 is an apocalyptic number.

It is an amenable number.

145256055661 is a deficient number, since it is larger than the sum of its proper divisors (1).

145256055661 is an equidigital number, since it uses as much as digits as its factorization.

145256055661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 145256055661 in words is "one hundred forty-five billion, two hundred fifty-six million, fifty-five thousand, six hundred sixty-one".