55807507193 has 2 divisors, whose sum is σ = 55807507194. Its totient is φ = 55807507192.

The previous prime is 55807507121. The next prime is 55807507207. The reversal of 55807507193 is 39170570855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53843953849 + 1963553344 = 232043^2 + 44312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55807507193 is a prime.

It is a super-2 number, since 2×55807507193² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55807507103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27903753596 + 27903753597.

It is an arithmetic number, because the mean of its divisors is an integer number (27903753597).

Almost surely, 2^55807507193 is an apocalyptic number.

It is an amenable number.

55807507193 is a deficient number, since it is larger than the sum of its proper divisors (1).

55807507193 is an equidigital number, since it uses as much as digits as its factorization.

55807507193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323000, while the sum is 50.

The spelling of 55807507193 in words is "fifty-five billion, eight hundred seven million, five hundred seven thousand, one hundred ninety-three".