55994465209 has 2 divisors, whose sum is σ = 55994465210. Its totient is φ = 55994465208.

The previous prime is 55994465167. The next prime is 55994465249. The reversal of 55994465209 is 90256449955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54678807225 + 1315657984 = 233835^2 + 36272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55994465209 is a prime.

It is a super-2 number, since 2×55994465209² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55994465249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997232604 + 27997232605.

It is an arithmetic number, because the mean of its divisors is an integer number (27997232605).

Almost surely, 2^55994465209 is an apocalyptic number.

It is an amenable number.

55994465209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55994465209 is an equidigital number, since it uses as much as digits as its factorization.

55994465209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496000, while the sum is 58.

The spelling of 55994465209 in words is "fifty-five billion, nine hundred ninety-four million, four hundred sixty-five thousand, two hundred nine".