55445449973 has 2 divisors, whose sum is σ = 55445449974. Its totient is φ = 55445449972.

The previous prime is 55445449949. The next prime is 55445450029. The reversal of 55445449973 is 37994454455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49436409649 + 6009040324 = 222343^2 + 77518^2 .

It is a cyclic number.

It is not a de Polignac number, because 55445449973 - 2²⁴ = 55428672757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55445449573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722724986 + 27722724987.

It is an arithmetic number, because the mean of its divisors is an integer number (27722724987).

Almost surely, 2^55445449973 is an apocalyptic number.

It is an amenable number.

55445449973 is a deficient number, since it is larger than the sum of its proper divisors (1).

55445449973 is an equidigital number, since it uses as much as digits as its factorization.

55445449973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432000, while the sum is 59.

The spelling of 55445449973 in words is "fifty-five billion, four hundred forty-five million, four hundred forty-nine thousand, nine hundred seventy-three".