55555506493 has 2 divisors, whose sum is σ = 55555506494. Its totient is φ = 55555506492.

The previous prime is 55555506467. The next prime is 55555506511. The reversal of 55555506493 is 39460555555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54138586329 + 1416920164 = 232677^2 + 37642^2 .

It is a cyclic number.

It is not a de Polignac number, because 55555506493 - 2¹³ = 55555498301 is a prime.

It is a super-3 number, since 3×55555506493³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55555506493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555506443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777753246 + 27777753247.

It is an arithmetic number, because the mean of its divisors is an integer number (27777753247).

Almost surely, 2^55555506493 is an apocalyptic number.

It is an amenable number.

55555506493 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555506493 is an equidigital number, since it uses as much as digits as its factorization.

55555506493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10125000, while the sum is 52.

The spelling of 55555506493 in words is "fifty-five billion, five hundred fifty-five million, five hundred six thousand, four hundred ninety-three".