55786807289 has 2 divisors, whose sum is σ = 55786807290. Its totient is φ = 55786807288.

The previous prime is 55786807253. The next prime is 55786807337. The reversal of 55786807289 is 98270868755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48057408400 + 7729398889 = 219220^2 + 87917^2 .

It is a cyclic number.

It is not a de Polignac number, because 55786807289 - 2⁸ = 55786807033 is a prime.

It is a super-2 number, since 2×55786807289² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55786801289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27893403644 + 27893403645.

It is an arithmetic number, because the mean of its divisors is an integer number (27893403645).

Almost surely, 2^55786807289 is an apocalyptic number.

It is an amenable number.

55786807289 is a deficient number, since it is larger than the sum of its proper divisors (1).

55786807289 is an equidigital number, since it uses as much as digits as its factorization.

55786807289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67737600, while the sum is 65.

The spelling of 55786807289 in words is "fifty-five billion, seven hundred eighty-six million, eight hundred seven thousand, two hundred eighty-nine".