55972889173 has 2 divisors, whose sum is σ = 55972889174. Its totient is φ = 55972889172.

The previous prime is 55972889143. The next prime is 55972889233. The reversal of 55972889173 is 37198827955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55858013649 + 114875524 = 236343^2 + 10718^2 .

It is a cyclic number.

It is not a de Polignac number, because 55972889173 - 2³³ = 47382954581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55972889143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27986444586 + 27986444587.

It is an arithmetic number, because the mean of its divisors is an integer number (27986444587).

Almost surely, 2^55972889173 is an apocalyptic number.

It is an amenable number.

55972889173 is a deficient number, since it is larger than the sum of its proper divisors (1).

55972889173 is an equidigital number, since it uses as much as digits as its factorization.

55972889173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 64.

The spelling of 55972889173 in words is "fifty-five billion, nine hundred seventy-two million, eight hundred eighty-nine thousand, one hundred seventy-three".