43625136778049 has 2 divisors, whose sum is σ = 43625136778050. Its totient is φ = 43625136778048.

The previous prime is 43625136777889. The next prime is 43625136778117. The reversal of 43625136778049 is 94087763152634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43277885859649 + 347250918400 = 6578593^2 + 589280^2 .

It is a cyclic number.

It is not a de Polignac number, because 43625136778049 - 2⁴⁰ = 42525625150273 is a prime.

It is not a weakly prime, because it can be changed into another prime (43625136778849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21812568389024 + 21812568389025.

It is an arithmetic number, because the mean of its divisors is an integer number (21812568389025).

It is a 1-persistent number, because it is pandigital, but 2⋅43625136778049 = 87250273556098 is not.

Almost surely, 2^{43625136778049} is an apocalyptic number.

It is an amenable number.

43625136778049 is a deficient number, since it is larger than the sum of its proper divisors (1).

43625136778049 is an equidigital number, since it uses as much as digits as its factorization.

43625136778049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 65.

The spelling of 43625136778049 in words is "forty-three trillion, six hundred twenty-five billion, one hundred thirty-six million, seven hundred seventy-eight thousand, forty-nine".