75553305257 has 2 divisors, whose sum is σ = 75553305258. Its totient is φ = 75553305256.

The previous prime is 75553305211. The next prime is 75553305271. The reversal of 75553305257 is 75250335557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59448680041 + 16104625216 = 243821^2 + 126904^2 .

It is a cyclic number.

It is not a de Polignac number, because 75553305257 - 2⁸ = 75553305001 is a prime.

It is not a weakly prime, because it can be changed into another prime (75553302257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37776652628 + 37776652629.

It is an arithmetic number, because the mean of its divisors is an integer number (37776652629).

Almost surely, 2^75553305257 is an apocalyptic number.

It is an amenable number.

75553305257 is a deficient number, since it is larger than the sum of its proper divisors (1).

75553305257 is an equidigital number, since it uses as much as digits as its factorization.

75553305257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2756250, while the sum is 47.

The spelling of 75553305257 in words is "seventy-five billion, five hundred fifty-three million, three hundred five thousand, two hundred fifty-seven".