55320946819 has 2 divisors, whose sum is σ = 55320946820. Its totient is φ = 55320946818.

The previous prime is 55320946817. The next prime is 55320946843. The reversal of 55320946819 is 91864902355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55320946819 - 2¹ = 55320946817 is a prime.

It is a super-2 number, since 2×55320946819² (a number of 22 digits) contains 22 as substring.

Together with 55320946817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55320946817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27660473409 + 27660473410.

It is an arithmetic number, because the mean of its divisors is an integer number (27660473410).

Almost surely, 2^55320946819 is an apocalyptic number.

55320946819 is a deficient number, since it is larger than the sum of its proper divisors (1).

55320946819 is an equidigital number, since it uses as much as digits as its factorization.

55320946819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 55320946819 in words is "fifty-five billion, three hundred twenty million, nine hundred forty-six thousand, eight hundred nineteen".