55815845269 has 2 divisors, whose sum is σ = 55815845270. Its totient is φ = 55815845268.

The previous prime is 55815845249. The next prime is 55815845291. The reversal of 55815845269 is 96254851855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30768668100 + 25047177169 = 175410^2 + 158263^2 .

It is a cyclic number.

It is not a de Polignac number, because 55815845269 - 2¹⁷ = 55815714197 is a prime.

It is a super-2 number, since 2×55815845269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55815845219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27907922634 + 27907922635.

It is an arithmetic number, because the mean of its divisors is an integer number (27907922635).

Almost surely, 2^55815845269 is an apocalyptic number.

It is an amenable number.

55815845269 is a deficient number, since it is larger than the sum of its proper divisors (1).

55815845269 is an equidigital number, since it uses as much as digits as its factorization.

55815845269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280000, while the sum is 58.

The spelling of 55815845269 in words is "fifty-five billion, eight hundred fifteen million, eight hundred forty-five thousand, two hundred sixty-nine".