55755707989 has 2 divisors, whose sum is σ = 55755707990. Its totient is φ = 55755707988.

The previous prime is 55755707957. The next prime is 55755708007. The reversal of 55755707989 is 98970755755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34456640625 + 21299067364 = 185625^2 + 145942^2 .

It is a cyclic number.

It is not a de Polignac number, because 55755707989 - 2⁵ = 55755707957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55755707089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27877853994 + 27877853995.

It is an arithmetic number, because the mean of its divisors is an integer number (27877853995).

Almost surely, 2^55755707989 is an apocalyptic number.

It is an amenable number.

55755707989 is a deficient number, since it is larger than the sum of its proper divisors (1).

55755707989 is an equidigital number, since it uses as much as digits as its factorization.

55755707989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138915000, while the sum is 67.

The spelling of 55755707989 in words is "fifty-five billion, seven hundred fifty-five million, seven hundred seven thousand, nine hundred eighty-nine".