755559955517 has 2 divisors, whose sum is σ = 755559955518. Its totient is φ = 755559955516.

The previous prime is 755559955483. The next prime is 755559955571. The reversal of 755559955517 is 715559955557.

Together with next prime (755559955571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 754872519556 + 687435961 = 868834^2 + 26219^2 .

It is a cyclic number.

It is not a de Polignac number, because 755559955517 - 2⁶ = 755559955453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (755559957517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377779977758 + 377779977759.

It is an arithmetic number, because the mean of its divisors is an integer number (377779977759).

Almost surely, 2^755559955517 is an apocalyptic number.

It is an amenable number.

755559955517 is a deficient number, since it is larger than the sum of its proper divisors (1).

755559955517 is an equidigital number, since it uses as much as digits as its factorization.

755559955517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 310078125, while the sum is 68.

The spelling of 755559955517 in words is "seven hundred fifty-five billion, five hundred fifty-nine million, nine hundred fifty-five thousand, five hundred seventeen".